Friday, 22 November 2013

1st prize at #SXSC3 Dragon's Den Business Plan Competition


It's a little hard to take in winning this incredible prize!

It will go a long way towards getting 3DBARE to proof-of-concept and beyond. 

Many, many thanks to the panel and the conference organisers of #SXSC3 !

For more about 3DBARE, our engine for Music You Can Walk Inside, and to get involved, please get in touch via 
Twitter (#benjaminmawson), 
Soundcloud (benjamin_mawson) or 
Linkedin.

Some key things about 3DBARE: 
Sound You Can Walk Inside

  • software to give listeners virtual experience of walking inside music.
  • translates motion-tracking into multi- channel binaural audio rendering.
3DBARE packages site- and event-specific audio content, creating a connection between digital and real-world experience through being situated at a physical location.

It will be used at a new kind of event that combines elements of concert, exhibition, silent disco, funhouse, public garden, dreamscape.

3DBARE allows listeners to move and make a virtual exploration of a soundscape: permits annotation of a space with audio that enhances both listening experience and individuals' connection to a place.

Why we think 3DBARE is essential:
• Digital studios permit ‘impossible’ music and sonic textures of greater complexity than can be fully heard through standard (loudspeaker) relay.
• Loudspeaker listening same as a CD or a gramophone record – it is passive and fixed, identical on each audition.
• Loudspeaker spatialisation is unconvincing, complex and expensive.
• Wireless headsets offer freedom to investigate sound as though it were a
physical structure.
• This permits recorded digital sound to be explored from continually changing perspectives.
• 3DBARE achieves a significant step towards "digital liveness".


To find out more and to get involved - send us your email address and we will get straight back to you

Tuesday, 19 November 2013

November Tea Party on Basic.fm

Saturday, 23rd November, 1730 GMT

http://www.basic.fm/november-tea-party-benjamin-mawson/

One minute preview of tomorrow's little festival of the banal, insane and wondrous:


Moving around crowded places is like a rapid-cut movie with complete surround sound, of fragmentary tales. Spontaneous capture of where someone’s going, or what they might be waiting for. What brought them right here, at this moment? What’s urgently at the front their mind to express, for just the second it takes to pass them and hear it?

Composing can be like that: if, instead of a formal structure, streams of idea and emotion that occupy the composing process can lead it, the transitions and places we ask the listener to follow us through, we can take you on a walk through real, imagined, simulated, impossibly combined experiences.

I want to take you on a walk through the crowded places of my recent listening and musical thought. It is not a picture of a particular thing: it meant different things as I made it, tells me new stories as I listen to the completed piece while writing this.

I hope you will give yourself to it, climb inside it (with headphones) for the time it takes to run.

There’s a miniature virtual-piano study, on which the piece hangs, with its own distractions and tangents, interruptions and alternative routes taken or just suggested.

I’ve also used tiny voice samples as keyboard notes, fragments of the Victorian composer Cyril Scott, a little moment from a well-known UK rapper (talking about my town) and various voices you will recognise immediately, removed from their context.

It’s a collage, a reconstruction of the pulsing, shifting emotive and geometric forms that the sounds I’ve used here inspired in me.

I’ve tried to make you smile as I did, and to feel some of the empathy, fear and exasperation that the sampled speakers inspired, while also inviting you to look with me through a window at something bluer, beyond.

Monday, 18 November 2013

Sound You Can Walk Inside, #SXSC3, Creative Digifest, Southampton, UK

SXSC3 Creative DigiFest, 19 November 2013

Digital Economy Strategic Research Group, University of Southampton

#SXSC3 Speaker profile: Ben Mawson

Benjamin Louis Mawson, Composer and Virtual Performance Developer‏. 

Working to make music composed in the digital studio come alive through motion-tracked real-time interactivity, using 3DBARE.
Ben’s recent work has included sound effects for a London stage production of
-  Bulgakov’s “Heart of a Dog” (simulating Moscow 1920s streets and domestic interiors) and the
-  Cotswold Motoring Museum (vintage motor racing audio in surround sound in the new exhibition space).

He has composed extensively for chamber ensemble in addition to more recent acoustic commissions including
-  “ROOM” (2011), in conceptual art show “Parallax” at John Hansard Gallery, Southampton (excerpt) and
- “Dreaming at the Circular Ruins” (2012), South Bank Centre, London.

Recent compositional work and his PhD thesis are about how composition in the digital studio can be made to simulate acoustic music impossible for human hands: 
doing things that seem to be happening but aren't, creating music you can walk inside and investigate like a physical structure, augmenting the auditory reality of a place.

He is currently working on a commission from New Dimensions (funded by Hampshire County Council) to build a community-based immersive Audio Portrait of Gosport, South East Hampshire, interpreting, depicting, augmenting the acoustic history and present of this pivotal historic port town.

It uses noTours software to create a geo-located multi-layered musical composition that draws on the contributions of hundreds of speaking, singing and playing residents and visitors to the town and is connected by a complex web of structurally linked fragments of virtual sonic reality. 

The composition will cover several hundred acres of the town, accessible via noTours software for Android.

Recent guest presentations on immersive audio have included Cap Gemini and Google, schools in Southampton and the Landscape Institute.


Ben is working on ways to present music created in the digital studio so the experience is continually changeable, impossible to hear the same way twice. These include multi-room speaker installations, GPS-based tracking with noTours software and wireless head-tracking (3DBARE) for listeners in an interior space - Music You Can Walk Inside.

He has a monthly show on internet radio station Basic.fm (Broadcast Art, Sound & Independent Culture) and posts regular articles at http://benjamin-mawson.blogspot.com.

In this event for SXSC3, Ben Mawson will be presenting noTours and 3DBARE, two distinct tools for listeners to walk inside an audio landscape. 3DBARE (under development) is a revolutionary approach to the creation of ‘digital liveness’, making repeated experience of fixed output continually changeable: Music You Can Walk Inside.

noTours software, by Spanish sound collective Escoitar.org is a means to annotate landscapes with audio via a GPS-enabled Android phone handset.

Ben will deliver a Master Class on Annotating Landscape with Sound, using GPS-based tool noTours  at the Avenue campus 65 / 2149 10-4 on December 6:  

“Annotating landscape with sound: an introduction to building geo-located audio sculpture.” 

A practical session on building geo-located sound structures in the landscape. 

Learn how to use the (free) editor software, build soundmaps, publish your work and share it with listeners: 

Watch Ben's video about working with noTours at St Paul's Cathedral here:









Tuesday, 22 October 2013

Happy Birthday Charles Ives

Dear Mr Ives

You composed music to be performed from mountain peaks for audiences in the valley between.

You messed with our sense of tonality, harmonic direction and temporal structure.

You created more questions than answers, in the style of a truly great thinker.

Your "Unanswered Question" remains one of the great western musical imponderables.

I dedicate this small foolish greeting to you and hope you are enjoying your birthday, somewhere suitably interesting.

Love etc,
Mawson


Monday, 21 October 2013

A brewery, a gig and Goebbels' secret bunker.

During the evening of my 2nd day at the "Functional Sounds Conference", I walked from the centre of the city, using the paper street map I had fought so hard to obtain on a public holiday. 

Out past Alexander Platz onto Friedrichshain, towards Prenzlauer Berg, I walked for around an hour, absorbing the strangely spacious yet oppressive architectural surroundings, still dominated by the remarkable, absurd 1960s radio tower.

Eventually, at a sudden and unlikely-looking entrance to a newly-built gated community, the street name I sought skulked diffidently in the shadows.

After so long a walk, by six lane motorways, in the rain, this end-of-journey surprise seemed like a kind of practical joke. 

I walked past identical pristine concrete boxes, a mixture somehow of reduced-scale Georgian London and Lego Bauhaus (if it doesn't yet exist, it should). 

At the end of this German Desperate Housewives landscape I did not expect to find an enormous ancient brick warehouse. The numbers were 76 and 78. Seeking 80 as instructed I accidentally strayed into one of the pristine gardens and started to imagine having my legs bitten off. 

I left and stood in confusion as it started once more to rain.

A man on a bike rode past and I called to ask where the studio was. He directed me to a dark corner with a heavy, ajar door, orange light from within.


I entered to a remarkable, huge cubic space with piano, scaffolding towers, an ancient Citroen and people sitting on sofas in the semi-darkness. I asked if this was the studio and they pointed me through a far door. 

I was now behind the fairy-lit bar in a fifteen metre high, square brick, iron pillared hall with Bluthner grand piano, mixers, modules and a Mac on the stage. 

Taking off my wet jacket and fetching a beer and some delicious sushi rolls I looked around to realise I didn't know a single person.

The evening progressed with a series of fascinating conversations with new acquaintances and some extraordinary music. 

Towards the end of the night, when almost everyone had left, I got into conversation with the owner, Jens Reule. He offered to show the only two of us remaining, me and Kevin Logan (Ear of the Duck) the underground bunkers beneath us. 


Down spiral stairs to the basement we followed in the dripping chill of pitch blackness behind Jens' torch beam. The first chamber, semi-cylindrical and around ten metres by forty was lined with rusted rectangular metal frames that had once supported bunk beds. 

A solid-rusted iron chain like an industrial stalactite dripped slowly to the floor by an arched doorway into a chillier, utterly dark second chamber. 

I entered alone, using my phone's feeble blue screen as my only light. Even twenty feet from the others I felt very alone and surrounded by whispering shades, a skin-creeping weirdness to be so close to this strangely silent memorial space.

We were, Jens told us, in the secret air-raid shelter of Goebbels' chosen Nazi-faithful families. The beds were used nightly by over a hundred people, mostly women and children in families working for or useful to the Ministry of Propaganda. 

The former brewery had been requisitioned due to its proximity to the Ministry (now an economics publishing house) and was connected by a number of tunnels to permit safe, rapid access. Goebbels was, according to Jens, not only tiny but a coward. 

Certainly it seemed that the miniature rusty manhole cover under which I stood in the echoing brick well exit was only fit for very young children. How hundreds could have clambered in or out of this hatch in a hurry was impossible to see.

Back to the hall through which we had entered, Jens shone his light into a smaller chamber, through the window space of a locked hefty wooden door. A solid-rusted bike leant against the far wall, next to folded bunk-bed frames. 

In front of these a dozen or so radio transmitters and receivers, the wheel of a tank and, mind-blowing, in a plastic bucket, far to the side, an Enigma machine, in pieces. 

Staring in silence at this mysterious, resonant hoard which Jens has cautiously, lovingly collected through years of local memento hunting, all we could hear was our breath and the quiet, echoing counterpoint of dripping brick.

On leaving, hushed in wonder, Kevin stopped at a thin, rusty iron door, unattached and leaning against a wall by the toilets. What's this, he asked. "Ah, that" said Jens with a proud grin, "is a blast door from the Führer Bunker." 

We ascended again to the empty sound stage, drank another beer with our host, admired the fine piano and played a little to each other. 

Thanking Jens for his hospitality (it was now 2 a.m) Kevin and I left and argued amicably about the way back to town, until the distraction of a kebab shop provided much-needed warmth and meat. Or, in his case, chickpeas.

We photographed the changing colours of the radio tower and discussed poeisis and beer as we walked the long route back. 

More on UFO studios here - its rich and surprising history, their unique approach to audio mastering and studio recording, the engineering team.



 










Sunday, 20 October 2013

Concepts for Virtual Performance. (2)


Thanks for reading the article and the fascinating responses already received to Concepts for Virtual Performance (1) through Google+ and Twitter. 


I look forward very much to a wider discussion about the terms we use to consider "performance" "liveness", "participation", "audience". . . 


Below is a message about Virtual Performance from Mike Milton, composer, multi-instrumentalist, Eigenharpist, movie-music consultant and my tentative responses in italics.


___________

[MM]    So,
- virtual: not physically existing as such but made by software to appear to do so.  
Mike Milton plays Eigenharp, 
advanced digital music controller
- musical performance: The act of performing music


[BLM]  What is the difference between performing and other forms of sound production? 

I would say it is particularly in the sense of playing To a person or group, of structuring a communicative act. 


We cannot perform in solitude. It is therefore, even if an identical act to the music played when alone, essentially differentiated in this deliberate conveyance of ideas or sensations to another.



  • {MM 2}  Is the reason you feel one cannot perform in solitude that the audience plays a role other than being there? If so, what is that role and how does it contribute to the performance? If not, why could one not perform in solitude? Is a rehearsal in solitude a performance? If a tree falls in the woods....  The key thing you mention is that a performance cannot be in solitude. I'd rephrase that to say a performance requires an audience (and I'd add that the audience must matter to the performance)


[MM]  I suppose that a virtual musical performance then uses software to give the appearance and it would rise above the level of a recording.

It might not require (or allow?) the person offering it to participate at the time of performance.
GPS-guided listening in my 
Audio Portrait of a City (2012)


[BLM]  I’m not sure I understand about it being “above” recording – does this mean it is more valuable or “authentic”because it is being delivered to specific persons at a particular time and place? 

Surely while the historic time constraints of early recording are not a limitation on live playing, there is still a process of constructing an experience at which the listener is present, of speaking to oneself while witnessed in the act? 


Does virtual performance therefore exclude the live-mixed delivery of largely pre-completed sound, such as electro-acoustic / tape music?


I agree that VMP uses software to give the appearance and effect of a live rendition (although there are pre-digital precedents in mechanical musical automata), but it could (and perhaps more commonly does) also imply the blurring between a performance perceived to have actually happened and one that was simulated – in other words a non-live or recorded transmission of that event.


So if the transmission is not of an act of performance being simulated in real-time, then perhaps it could also be said that a highly edited recording was equally a form of virtual performance.




  • {MM2}    I intended only that a recording lacks some aspects of a performance such as the results of an interaction with the audience for the recording (even if there was an audience for the recorded performance. The effect of giving a performance is to somehow include the audience in a material way.  
  • I'd say that what the sounds are made from is not relevant to something being a performance. Perhaps the underlying question (that we skipped over a bit) is: What is a performance? On reflection my earlier comments define performance as an interaction between the performer and the audience. Defined that way, it might be easier to see why a recording (even a recording of a performance) is not *itself* a performance even though the viewer can see that the performer *was* performing for others and may react much like the original audience. The key difference is that their reaction and any impact of that reaction is absent from the recording. Performances never repeat exactly, recordings do?
  • Was the editing done in solitude? If not, was the act of editing the performance or is the result of editing the performance or both?


[MM]  Is a person giving a concert on Second Life a virtual performance? 

Many would probably say it was since the audience sees avatars (software entities that render the appearance of the performance). 

I think it is either a real performance delivered in a virtual space or, if it is not real-time, a recorded performance delivered in a virtual space.


[BLM]  Yes, I believe it can be. 

I know of (but didn’t have the weird pleasure of attending) a Suzanne Vega concert that took place some years ago on Second Life. 


My erstwhile PhD advisor, Richard Polfreman, who develops digital interfaces for ‘performance’ and ‘composition’ was in contact with the person who built her virtual guitar (for which he was paid in real-world pound notes). 


One of his tools uses adapted drivers for the Novint Falcon, an interactive motorised joystick controller which gives powerful haptic response to virtual objects used as musical instruments. 


If the “string” plucked is not a string but a piece of code describing some of the acoustical properties of a string, accessed through a digital controller and a software interface, even if the sound is produced before an audience, surely there is a strong contingent of virtuality to the communication?


But even if you don’t concede that,  and maintain that it’s a live performance on a virtual instrument, how, if we are unable to say with certainty if it is happening now or being relayed to us later, can we say whether it is a virtual performance or a recording?


Indeed, the recording is, at least in some circumstances, a virtual performance.



  • {MM2}  I believe it can be (but often is not) as well. 
  • The condition for this is that the audience matter to the outcome. Tim Exile sourcing sounds from his audience for his performances are a good example (that I'll mention again). 
  • I'd still suggest that a recording of that performance can be entertaining but is not itself a performance and the listener does not experience being an audience member or any facsimile of that experience. 
  • I'd say the original experience IS a performance even though it is delivered online but not a virtual performance because the audience <-> performer interaction is real and not virtual. 
  • If Tim Exile 'canned' the ability for a future audience to interact with a SW system that simulated what he did in his performance, *that* would be a virtual performance.


[MM]  Is a person playing a virtual instrument to an audience a virtual performance? 

No, it is a real performance of a virtual instrument.

Is a video of a concert a virtual performance?  No. 

It isn't a performance at all, just the recording of one. 

(Why? it is static and unresponsive. The things that change from performance to performance are simply replayed identically)


[BLM]  The qualities of stasis or responsiveness are not exclusively the defining ones – I think of Sviatoslav Richter’s insular manner on stage. 

He appeared before a crowd and played the music. Incredibly. But arguably not to them or even for them. 


There was a strong sense that he did not wish to be before an audience in order to get his cheque. 


For different reasons, Glenn Gould retired from the stage to work in the studio, sculpting ‘perfect’ performances by splicing segments of his innumerable striving takes together into a subjective ideal. 


This is how I and many composers work now, with all the apparent greater ease of the DAW over the magnetic tape splicer, always though, bearing in mind the affordances and constraints of the tools which, just like the particular qualities of two different pianos, suggest and lead one towards particular types of music-making. 


But that is for another place.




  • {MM2}  Good points. However, we are discussing performance as well as music. There is no question that wonderful music can be created in the absence of performance and in some cases could not be created in a performance. 
  • So we agree on the point and on the notion that it does not do much to inform this discussion. That said, people who choose to construct music as you describe above sometimes take conversations about performance as a slight on their preferred path to creation. 
  • They should not do this as there are both possibilities and impossibilities on either path. They are simply different vs. being better or worse or more or less effective. 
  • Oh and do you really think that a delivery of (even the most wonderful) music that completely ignores the audience is [not] a performance? 
  • I Do think so for the perverse reason that the audience will react and some will react to being ignored and that, even by dismissing this reaction, the performer is interacting.



[MM]  Is a person directing a computer performance in real time (say using reactable or pre-programmed music parts in a DAW) a virtual performance?

Possibly, but it seems too close to a real performance in that the performer is interacting in real time, directly. 

They are, in fact, performing even if they are assisted in doing so.



[BLM]  I completely agree:  however underwhelming it may be to watch an engineer operate sliders and pots at a lamp-lit mixing desk  -  in comparison to Satchmo’s eye-popping high register, heroically summoned from a coiled brass tube  -  it is in some senses still a performance: actions undertaken in front of a crowd gathered for the purpose of witnessing these actions.



  • {MM2}  Which is *exactly* why an Eigenharp exists. While it is not limited to the hybrid approach of performing with pre-programmed components, it allows it in a more front-of-stage way. 
  • One specific design goal was to allow for a full throated performance by such an electronic musician. It would be a great way to enhance, for example, the performances of Tim Exile. 
  • I particularly appreciated his use of audience supplied sounds in performance (which was online BTW) as one perfect example of audience being material to a performance.



[MM]  So, it seems to me that a virtual performance should work like generative music except that the software acts on performance aspects rather than (or in addition to) the musical aspects.



[BLM]  This is, for me, the confusing part of what you write here Mike: isn’t “generative music” more a compositional process, even a genre or style of production – a way of thinking about the content of music produced - rather than necessarily to do with virtuality, performance, recordings or liveness?



  • {MM2}  Yes, sorry, not very clear. I was suggesting that approaches similar to those used in generative music could potentially create generative performances. 



[BLM] Certainly the virtual performances which I build would not easily sit in the same category as say Brian Eno’s music.

For me, the essence of virtual performance is that it seems to be a performance, it seems to be plausible as a performance and could be happening. 


But it isn’t.  And since the only reason I can think of to make a performance that seems to be happening but isn’t, is that it couldn’t really be performed.




  • {MM2}   Another reason is to allow time and place shifting of a performance so that audiences who are not there, then can experience a performance.



[BLM] I compose music then edit the delivery of that sound to try and make it appear that it is being or has been played by human hands. 




  • {MM2}  To me the issue isn't the appearance of being played by human hands but the experience of being played for me as an audience. Should one applaud a recording? Why would this matter?


[BLM] The fact is, those hands and brains would in fact be incapable of playing this music for reasons of finger strength, agility, stamina, hand size, speed of thought, complexity of rhythm and so on.


So for me virtual performance is the creation of an event or the apparent record of an apparent event where that which is not happening and could not happen, appears to be happening.


Here are two examples:


(1) a pretty unrefined essay in virtuality from 1999, Songs from an Island in the Moon No.16 – an incidental piece for a stage setting of William Blake’s prose satire, An Island in the Moon.





(2) a very recent (2013) composition that takes both played (MIDI and audio input) and generated performance (through instructions to a DAW, written and drawn on the screen) and transforms these beyond what either player or instrument could physically do, Virtual Piano Study No. 1.





[MM]  The author states the rules but then the software alone creates the performance. It is not a recording because the performance will vary based on inputs that feed the rules.


  • {MM2}  My take would be that the software creates a musical rendition. If the software has inputs from the audience, then is also creates a performance. These inputs could be realtime (is the audience quiet or loud, moving or still, and so on) or made in advance by answering questions (are you happy or sad, is your hearing full range or limited, do you prefer jazz or blues, etc)


[BLM]  I agree, that would be a potentially interesting way to work although I for one have never done it, so I wouldn’t recognise the method as a defining one for the more general practice of Virtual Performance. 
A nice idea although I would be so consistently in need of interference, adaptation, editing, that this would only be a starting point for building primary objects to compose with – my end results are always as specifically determined in their minutest detail as I can make them, more like an edited film than teaching an automaton to act for itself so, I suppose, closer to a recording than to something that can truly be called a performance.
Going back to the above examples, for me the Virtual is the principal part, the fact that it seems to be done but in reality could not be done.


  • {MM2}  For me the principle thing is that the audience and player interact or seem to interact (even if that interaction is to ignore one another)

[MM] Consider Tom Jackson's approach to live music production.
He provides a number of performance tools and coaches performers to deconstruct their music into 'moments' that can be used as components to deliver their song in a way quite different than as a recording.
Specifically, in a way that lets an audience see 'into' the construction of the song and allows the performer to point out things they would otherwise miss (like a nice little riff or chord change or piece of percussion or a key lyric).
'Improvising' in this context is simply drawing out, repeating, or eliminating these moments as part of a specific performance for a unique audience.
One might anticipate that a generative approach to doing this would result in a virtual performance.


[BLM]  Sounds like a really interesting approach to music-making and certainly one that would yield surprising results. 

I have been listening to the lush, post-Romantic piano music of Stephan Beneking

I asked his permission to sample and use some fragments from his work - compositions making of his material collaged, reflective responses: would it depend on whether you believed you were hearing them delivered (1) in real-time or (2) by a human pianist to call them virtual performances?

Definitions may be more problematic, limiting, than illuminating in this area, at this early stage in the subject.

I started using the term Virtual Performance to describe my simulations of sonic/musical things happening that could not really be happening.

Then I stretched that to other areas, like something that could conceivably be played if adapted or could readily be played if transcribed and rehearsed by a human.

Then it became, like for Gould, a seeming performance that was in fact sculpted, was in fact a recording: frozen. 

Perhaps this is no longer a Virtual Performance?

Is simulating rhythms from recorded water drips a virtual performance, given that the drip was a naturally occuring phenomenon and not a human act?

If not, do we call Reduzent’s “Solenoid Concert” a performance?

“a software-sequencer controls 8 solenoids, that knock on different things and therefore produce some rhythmic noise. made with puredata, an arduino board and a selfmade relayboard to control the solenoids.” 





  • {MM2}  So, this is full circle. We agree on a great deal and differ about the number of angels on the head os a small pin. I'd add just one angel which is a material role for the audience before naming something a performance. Perhaps this is the appeal of concert recordings. They are not performances but at least they reflect and deliver what one performance for an audience was. It isn't clear to me why a concert recording would be different than a studio recording except for the extent to which an audience is a part of a performance.




______________________


My replies to Mike and further propositions on the nature of Virtual Performance will be in Part (3).



Please follow and comment to join the discussion!





Virtual Piano Study No.1


As I mixed my 'factory' pianos with Conlon Nancarrow's ancient Ampico player-piano (thanks again to Trimpin who obtained and shared it), I started to feel as though each instrument should occupy a different (virtual) physical space. 
Like characters in separate rooms, speaking to, at, over, against, about, in spite of each other.
We move through a series of shadowy places, sometimes close, tight interiors then through warped thresholds to unreal open sky. 

This music is an exercise in 

  • using the sound sources, themselves alone and in uncomfortable combination, 
  • in auditory credulity and credibility, 
  • in exploring the essence of 'realism' and the 'realistic', 
  • how virtual space can be created through delay, reverberation, texture 
  • . . . and retained (after lossy compression to stereo mp3) for headphone listening
  • and in dramatising the wordless languages of musical dreams from which I often wake to sit staring at the dark. 

At those apparently silent moments, music like this has its beginnings. 

Please spend a few seconds to say what you see/ smell/ think of as you hear this:
(Like, Comment, Share, thou knowest the rest)