Re: [music-dsp] TMS320 commercial synth/effects?

[Peter P.]

* Tristan  [2020-07-20 13:42]:
> Hi Peter,
> 
> The Eventide H3000 uses TMS32010 DSP chips.
> 
> https://reverb.com/news/tech-behind-eventide-h3000-ultra-harmonizer
Thanks Tristan and everyone else for this insight! My interest is only
historic/academic. Does anyone know any other products using these
chips?

cheers, P
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[music-dsp] TMS320 commercial synth/effects?

[Peter P.]

Dear list,

I am looking for examples of commercial synthesis and audio effects
products using DSPs from the TMS320 family.

Thanks in advance for any pointers!
cheers, Peter
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Re: [music-dsp] pitch shifting in frequency domain Re: FFT for realtime synthesis?

[Peter P.]

Dear Scott,

* Scott Cotton  [2018-10-28 10:49]:
> I don't know if you're "doing it the right way", however, pitch shift by
> bin shifting has
> the following problems:
> 
> -edge effects (using windowing can help)
> - pitch shift up puts some frequencies above nyquist limit, they need to be
> elided
> - the quantised pitch shift is only an approximation of a continuous pitch
> shift because
> the sinc shaped realisation of a pure sine wave in the quantised frequency
> domain can occur
> at different distances from the bin centers for different sine waves,
> shifting bins doesn't do this
> and thus isn't 100% faithful.
> 
> From the sound clip, I'd guess that you might have some other problems
> related to normalising the
> synthesis volume/power
> 
> The best quality commonly used pitch shift comes from a phase vocoder TSM:
> stretch the time
> and then resample (or vice versa) so that the duration of input equals that
> of output.  Phase vocoders
> however vary a lot in the quality of sound they produce, some are even as
> bad or worse than the example
> you provided.

Thank you for this nice explanation, I wonder if you could even add a
few more lines to it regarding the quality of phase vocoders. Your text
ended when it was getting even more exciting. :)

Thanks!
P
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Re: [music-dsp] glitch free looping

[Peter P.]

* Martin Hermant  [2017-02-10 11:19]:
> Thanks for these insights!
> 
> @Peter :
> I like the two play heads solution (and I’m already using these for handling 
> sudden jumps)
I like to put it like this:
> still It involves some playback logic, i.e you don’t play the end of the 
> buffer the same way if you are looping or stoping, I’m I right?
I think you are right. In case where you stop, you only read with one of
the playback heads until the end. But in cases where you would do a
short fade-out at the end, it would again turn out to be the same way as
when looping but without fading in to the other playhead.
Put in other words: Crossfading between playheads means fading one out,
the other in. The other one reads a bit ahead of the first, so you need
to have access to a bit more audio date in buffer than your actual loop
length. 
> 
> I‘m in search of a ‘static method’ where buffer is processed once to ensure 
> seamless looping ,
> may be there no such thing? may be it’s not worth it? 
This works easily, but you can not add (overdub) material later, or
change the loop length. 
An example how to do this can be found in the following sox script:
http://plessas.mur.at/devel/musger/mg_seemless

> though, this solution means having an extra zone added to the end or 
> beginning to be able to keep sync (can’t start fade from sample 0 before the 
> last sample is played)
Yes, see comment above.
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Re: [music-dsp] Geographical visualization of music-dsp list participants

[Peter P.]

Hi Peter,

* Peter S peter.schoffhau...@gmail.com [2015-02-11 03:05]:
 Hi All,
 
 Since I like to know who I am communicating with, I did an analysis on
 the visitors who clicked on the links that I posted here. This should
 represent a large part of the people who actively read this mailing
 list.
Thank you! This is a nice visualization. If I may correct a tiny little
bit, I see it more as a representation of the people who clicked your
link, which might not be synonymous with people reading the list (but
you are sure aware of this difference). What link were people supposed
to click on by the way?
 
[...] 
 Close-up of San Francisco - Los Angeles area:
 http://morpheus.spectralhead.com/img/musicdsp/usa-west.png
I am just curious who the lucky girl/guy is that accessed your link from
the Channel Island National Park. ;)
 
 Close-up of USA East region:
 http://morpheus.spectralhead.com/img/musicdsp/usa-east.png
 
 Visitor classification based on operating system:
 44.36% - OS X
 33.83% - Windows
 14.23% - Linux
 6.77%  - iOS
 0.75%  - Android

Do you know how many accesses are from web spiders/crawlers?

thanks again for your nice visualizations!
Peter
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[music-dsp] Call for Applications: IEM Graz Music Residency Program 2014

[Peter P.]

IEM Music Residency Program 2014 - Call for Applications

(please distribute)

The Institute of Electronic Music and Acoustics (IEM) in Graz, Austria
is happy to announce its new Music Residency program and invites
applications from artists, scholars and practitioners for the 2014
edition.

The Residency is aimed at individuals wishing to pursue projects in
performance, composition, installation and sound art, development of
tools for art production and related areas.

Duration of residency: 5 months
Start date: January 1st 2014 (negotiable)
Monthly salary: Approx. EUR 1100 (net)

APPLICATION DEADLINE: 1st of September 2013 23:59 CEST

The Institute of Electronic Music and Acoustics is a department of the
University of Music and Performing Arts Graz and was founded in 1965.
An internationally well reknown institution in its field, it currently
holds a staff of more than 25 members. IEM offers education to
students in composition and computer music, sound engineering, contemporary
music performance and musicology. It is well connected to the University of
Technology as well as to the University of Graz through two joint
study programs.

The artwork produced at IEM is released through the Institute's own
OpenCUBE and Signale concert series, as well as through various
collaborations with international artists and institutions.

IEM's main activities are centered around the three main research areas
 Computer Music
 Artistic Research
 Signal Processing and Acoustics
and contributions to these, or any other field of relevance, are
invited for the Music Residency program.

What we expect from applicants:
-An outstanding project proposal that adds new perspectives to the
Institute's activities and resonates well with the interests of IEM
members and students.
-The succesful applicant will work on-site in Graz for the major part
of the Residency.
-Willingness to exchange and share ideas, knowledge and results with
IEM staff members and students and engage in scholarly discussion.
-The ability to work independently within the Institute as well as a
strong initiative to integrate into the faculty life.
-A dissemination strategy as part of the project proposal that ensures
the publication of the work, or documentation thereof, in a suitable
high-quality format. This could be achieved for example through the
release of media, journal or conference publication, a project website
or other means that help to preserve the knowledge gained through the
Music Residency and make it available to the public.

What we offer to the successful applicant:
-Support in artistic production and arts-based research
-Exchange with competent and experienced staff members
-Work and office space
-Contact with peers from similar or other disciplines
-Infrastructure (electroacoustic music studios, icosahedral
loudspeaker array, motion capture technology)
-Concert and presentation facilities (CUBE 24 channel loudspeaker
concert space)
-Existing networks with local/international partners
-We provide a monthly salary of approx. EUR 1100 net per month in
addition to health and accident insurance.

An application form providing more information is available at
http://iem.at/~residency/applicationForm-IEM-MusicResidency2014.odt
or
http://iem.at/~residency/applicationForm-IEM-MusicResidency2014.docx

Feel free to contact reside...@iem.at with questions.

kind regards
Peter Plessas
IEM Graz
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