On Nov 30, 2015, at 2:00 PM, [email protected] wrote:
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Today's Topics:
1. Frame Size for Audio Unit Rendering (ex. FFT/IFFT) (Daniel Wilson)
2. Re: Frame Size for Audio Unit Rendering (ex. FFT/IFFT) (Roman)
3. Re: Frame Size for Audio Unit Rendering (ex. FFT/IFFT)
(Paul Davis)
4. Re: Frame Size for Audio Unit Rendering (ex. FFT/IFFT)
(Daniel Wilson)
5. Re: Frame Size for Audio Unit Rendering (ex. FFT/IFFT)
(Paul Davis)
----------------------------------------------------------------------
Message: 1
Date: Sun, 29 Nov 2015 23:08:01 -0600
From: Daniel Wilson <[email protected]>
To: [email protected]
Subject: Frame Size for Audio Unit Rendering (ex. FFT/IFFT)
Message-ID: <[email protected]>
Content-Type: text/plain; charset=windows-1252
Does anyone know how to change the frame size when doing the digital signal
processing on an audio unit? Currently my audio unit is set up so that it
receives a single sample, does the signal processing, outputs the sample, and
repeats the process for each sample of the audio signal. I have created quite a
few audio units with this set up but now I want to process multiple samples at
the same time to do the FFT/IFFT, etc. Does anyone know how to do this? It
seems like most people are using audio units for iiOS, but my audio units are
for OS X to be used in programs like Logic Pro. Don’t know if that makes a
difference.
-Daniel
------------------------------
Message: 2
Date: Mon, 30 Nov 2015 13:54:04 +0300
From: Roman <[email protected]>
To: Daniel Wilson <[email protected]>,
[email protected]
Subject: Re: Frame Size for Audio Unit Rendering (ex. FFT/IFFT)
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi Daniel,
You need to implement buffering and output silence while you don't have
enough audio samples for your FFT/IFFT transformation. It is necessary
to output the correct value for GetLatency/GetTail functions.
30.11.2015 08:08, Daniel Wilson пишет:
Does anyone know how to change the frame size when doing the digital signal
processing on an audio unit? Currently my audio unit is set up so that it
receives a single sample, does the signal processing, outputs the sample, and
repeats the process for each sample of the audio signal. I have created quite a
few audio units with this set up but now I want to process multiple samples at
the same time to do the FFT/IFFT, etc. Does anyone know how to do this? It
seems like most people are using audio units for iiOS, but my audio units are
for OS X to be used in programs like Logic Pro. Don’t know if that makes a
difference.
-Daniel
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--
С уважением,
Роман
------------------------------
Message: 3
Date: Mon, 30 Nov 2015 08:43:48 -0500
From: Paul Davis <[email protected]>
To: Daniel Wilson <[email protected]>
Cc: CoreAudio API <[email protected]>
Subject: Re: Frame Size for Audio Unit Rendering (ex. FFT/IFFT)
Message-ID:
<CAFa_cKk0PEaVFzw3Uv2jFAJ=z4yfyvg0rxlc2uyg4pwxq+k...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
AudioUnits do not get to control the buffer size delivered via a render
call. The host decides this.
On Mon, Nov 30, 2015 at 12:08 AM, Daniel Wilson <[email protected]>
wrote:
Does anyone know how to change the frame size when doing the digital
signal processing on an audio unit? Currently my audio unit is set up so
that it receives a single sample, does the signal processing, outputs the
sample, and repeats the process for each sample of the audio signal. I have
created quite a few audio units with this set up but now I want to process
multiple samples at the same time to do the FFT/IFFT, etc. Does anyone know
how to do this? It seems like most people are using audio units for iiOS,
but my audio units are for OS X to be used in programs like Logic Pro.
Don’t know if that makes a difference.
-Daniel
_______________________________________________
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Message: 4
Date: Mon, 30 Nov 2015 07:52:26 -0600
From: Daniel Wilson <[email protected]>
To: Paul Davis <[email protected]>
Cc: CoreAudio API <[email protected]>
Subject: Re: Frame Size for Audio Unit Rendering (ex. FFT/IFFT)
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"
Paul thank you. That makes perfect sense. How do I switch my processing to
process the entire buffer at once and not just one sample at a time?
Sent from my iPhone.
On Nov 30, 2015, at 7:43 AM, Paul Davis <[email protected]> wrote:
AudioUnits do not get to control the buffer size delivered via a render call.
The host decides this.
On Mon, Nov 30, 2015 at 12:08 AM, Daniel Wilson <[email protected]>
wrote:
Does anyone know how to change the frame size when doing the digital signal
processing on an audio unit? Currently my audio unit is set up so that it
receives a single sample, does the signal processing, outputs the sample, and
repeats the process for each sample of the audio signal. I have created quite a
few audio units with this set up but now I want to process multiple samples at
the same time to do the FFT/IFFT, etc. Does anyone know how to do this? It
seems like most people are using audio units for iiOS, but my audio units are
for OS X to be used in programs like Logic Pro. Don’t know if that makes a
difference.
-Daniel
_______________________________________________
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Message: 5
Date: Mon, 30 Nov 2015 09:07:14 -0500
From: Paul Davis <[email protected]>
To: Daniel Wilson <[email protected]>
Cc: CoreAudio API <[email protected]>
Subject: Re: Frame Size for Audio Unit Rendering (ex. FFT/IFFT)
Message-ID:
<cafa_ckn7dd3hzscfrxwhp7g9gbj-nt+zbjg4urcmjirfdud...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Sorry, no idea. I'm a host author (Ardour / Mixbus / Tracks Live), not a
plugin writer. A host just gives you a block of samples, with the size of
its own choosing. What you do with them is up to you. As Roman mentioned,
you need to plan on buffering them and running your FFT periodically.
On Mon, Nov 30, 2015 at 8:52 AM, Daniel Wilson <[email protected]>
wrote:
Paul thank you. That makes perfect sense. How do I switch my processing to
process the entire buffer at once and not just one sample at a time?
Sent from my iPhone.
On Nov 30, 2015, at 7:43 AM, Paul Davis <[email protected]>
wrote:
AudioUnits do not get to control the buffer size delivered via a render
call. The host decides this.
On Mon, Nov 30, 2015 at 12:08 AM, Daniel Wilson <[email protected]
wrote:
Does anyone know how to change the frame size when doing the digital
signal processing on an audio unit? Currently my audio unit is set up so
that it receives a single sample, does the signal processing, outputs the
sample, and repeats the process for each sample of the audio signal. I have
created quite a few audio units with this set up but now I want to process
multiple samples at the same time to do the FFT/IFFT, etc. Does anyone know
how to do this? It seems like most people are using audio units for iiOS,
but my audio units are for OS X to be used in programs like Logic Pro.
Don’t know if that makes a difference.
-Daniel
_______________________________________________
Do not post admin requests to the list. They will be ignored.
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