Re: Need to hire a software developer for a voice processing app!
Re: Need to hire a software developer for a voice processing app!
- Subject: Re: Need to hire a software developer for a voice processing app!
- From: "Paul Sanders" <email@hidden>
- Date: Sat, 20 Feb 2010 11:07:56 -0000
If you can't use Audio Units, there is some 'wide open
license' pitch-shifting source code here:
There's also a link to an article which explains how it
works. The funtions of AUDelay and AUMixer should be easy enough to
implement, and you should be able to find someone to write you some Core
Audio code to play the resulting data stream, if that proves
necessary.
Paul Sanders.
On 18/02/2010 22:39, Thomas David Kehoe
wrote:
> Casa Futura Technologies is the leading manufacturer
of electronic assistive
> devices for speech disorders. We need to hire a
software developer to make a
> prototype speech aid for Parkinson's
patients. We believe it should be easy
> to develop it as a Macintosh app,
using Audio Units provided by Apple. If
> the prototype is effective in
clinical trials we will then have the
> Macintosh app ported to the
iPhone. (When will Apple include Audio Units in
> the iPhone operating
system?)
>
> The app provides the user's voice to the user's ears in
real time, altered
> in several ways. The Audio Units used
are:
>
> - AUDelay. 50 to 200 milliseconds. Receives input from the
microphone,
> outputs the delayed signal to the
headphones.
>
> - AUPitch. -1 to +1 octaves. Receives input from the
microphone, outputs the
> pitch-shifted signal to the
headphones.
>
> - AUAudioFilePlayer and AUMixer. Takes an audio data
file of masking noise
> (I have this on a CD) and mixes it with the
delayed and pitch-shifted audio
> signal.
>
> I also need to
have the microphone input volume analyzed (i.e., how loud the
> user is
speaking) and then inversely relate the masking noise output volume.
>
I.e., when the user is speaking too quietly, he receives loud masking
noise
> in his headphones to induce the Lombard effect, which induces him
to speak
> louder. When he speaks louder, the volume of the (annoying)
masking noise
> drops, as a biofeedback positive reward. There should also
be a graphic
> display of vocal volume.
>
> In a later version
I would like to have a pitch analyzer too.
>
> Parkinson's patients
lose their ability to move their speech muscles
> sufficiently, resulting
in quiet, inarticulate mumbling. The masking noise
> induces them to speak
louder, the pitch shift makes them speak more clearly,
> and the delay
steadies their pacing. You can watch a video of Parkinson's
> patients
using our devices on our website.
>
> I have a patent pending on all
this, so no need for a non-disclosure
> agreement.
>
> Please
recommend anyone you know who is qualified to develop this app. If
> you
wish to develop this app for us, please send us a time and cost
>
estimate.
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