Garth Hjelte | 4 Feb 20:04 2016
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PortAudio internal question

I know that PortAudio has to do some things to make things generic and cross-platform, but given this
circumstance how much possible compromise would PortAudio impose?

I have a client that is using some Avid pro audio cards, recording at 96kHz. He makes a complaint that he hears
zipper noise and the ends of samples (re: when the signal is low). He says using another system other than
mine (probably not PortAudio-based) he doesn't get that zipper noise.

Another possible unrelated question: Do all audio cards process in 32-bit float resolution and do any
lower bitrates result in our apps dithering that 32-bit float data? Certainly for me I always specify
32-bit float in my OpenStream() call.

Basically, I'm just trying to figure out hwo to answer my clients zipper complaint.

Garth Hjelte
Sampler User
ty armour | 31 Jan 23:56 2016

just a friendly development question

I am looking for tutorials on basically how to write portaudio. This would aid me in developing your software and fixing bugs, if you just went back and explained how to rewrite portaudio.

You could also if you like post tutorials on using portaudio in applications. you could basically rewrite guitarix rakarrack hydrogen lmms or bristol using portaudio and then post tutorials on it all. it would again aid in development of port audio as well as extend the reach of your software.

you could even compile and use port audio and the software i suggested under mingw and cygwin. although I know you would have to develop both of those, i think it would help further the reach of portaudio as well as provide useful information to developers.

anyhow thanks for your time and have fun.

you could have fun and get creative...the more tutorials you post the more people can develop your software and the more extensible your software becomes

Thanks
-Ty

might even consider compiling or writing portaudio for arduino.

you could actually write wrappers for portaudio too. you could easily write a java php perl and ruby wrapper and extend the usability of your software even further.

Thanks
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M.M Ishan | 29 Jan 12:58 2016
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Real time audio processing for windows mobile applications using c++ along with port audio

Can we do real time audio processing with portaudio along with c++ for windows mobile apps?. 
However i couldn't find any better example to do real time audio processing with c++ using portaudio.

IS IT POSSIBLE TO DO REAL TIME AUDIO PROCESSING WITH PORT AUDIO???

if possible, then how? can you please give me basic steps or examples?

REQUEST EXAMPLE SOURCE CODES TO DO REAL TIME AUDIO PROCESSING WITH C++ ALONG WITH PORT AUDIO FOR WINDOWS MOBILE APPLICATIONS????
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Spencer Kim | 25 Jan 01:08 2016
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How do I increase frequency?

Hello,


I'm very new to port audio and I was wondering how to increase frequency of the sound that i'm generating.

I think it has to do something with this code,


data.left_phase = 10;
data.right_phase = 10;


What is this code and what does it do?


Thanks
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Jan Ekholm | 22 Jan 13:40 2016
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Recommended version?


Hi,

I have an older media streaming thingie that I built a few years ago using Portaudio. It worked
fine but wasn’t really used that much. Now I’m about to update the code and all dependencies a 
bit.

Which version of Portaudio should be used for something that should be fairly stable? Actually,
it must be really, really stable. The version on the website is pa_stable_v19_20140130.tgz but
that is 2 years old. Is there any recommended SVN snapshot that have been found to be
very stable? Is there any reason for not releasing a stable version every now and then, or are
there big internal changes in progress?

Best regards,
    Jan Ekholm

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Alberto di Bene | 18 Jan 15:46 2016
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Re: unsubscribe

On 1/18/2016 3:38 PM, michaeldilmore <at> aol.com wrote:

unsubscribe



It looks like people cannot read, or is too lazy to do it........



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Surendar Sanke | 17 Jan 07:25 2016
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Re: Portaudio Digest, Vol 7, Issue 8

I would like to stop receiving mails please do me favor

On 17-Jan-2016 11:52 am, <portaudio-request <at> lists.columbia.edu> wrote:
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Today's Topics:

   1. Re: using multiple USB cards with port audio (Ranjan)


----------------------------------------------------------------------

Message: 1
Date: Sun, 17 Jan 2016 11:51:23 +0530
From: Ranjan <infibit <at> gmail.com>
To: portaudio <at> lists.columbia.edu
Subject: Re: [Portaudio] using multiple USB cards with port audio
Message-ID:
        <CAPOqmUH14ZCFrRWPuUe+Jn2y1FxhK2AUnP_uC=WHMmhYg=emOQ <at> mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

I now want to set the SAMPLE_RATE to 2000 but I get an error when I try to
do that. (error attached). How can I get a 2000 sample rate from the audio
device?44100 is too heavy for me.I think I will sub-sample it to 2000 from
44100 anyhow but can I set it to 2000?

On Sun, Jan 17, 2016 at 11:45 AM, Ranjan <infibit <at> gmail.com> wrote:

> It is solved now.I set the FRAME_PER_BUFFER  to 1,2 etc and it became
> finer. Thanks.
>
> On Sun, Jan 17, 2016 at 10:31 AM, Ranjan <infibit <at> gmail.com> wrote:
>
>> Well there is a problem. After I set the channels to 1 now the sound of
>> me speaking recorder is like a cat talking. What is wrong?
>>
>> On Sun, Jan 17, 2016 at 10:12 AM, Ranjan <infibit <at> gmail.com> wrote:
>>
>>> I checked each of the output carefully and it was giving an error in the
>>> number of channels.I changed the no.of channels to 1 and it worked.
>>>
>>> On Sun, Jan 17, 2016 at 10:00 AM, Ranjan <infibit <at> gmail.com> wrote:
>>>
>>>> I am getting a consistent device list now after I changed the device id
>>>> pointer.(attached) But I am still not able to get the other device to
>>>> record or play.
>>>>
>>>> On Sun, Jan 17, 2016 at 9:50 AM, Ranjan <infibit <at> gmail.com> wrote:
>>>>
>>>>> Only if the device is a default device (be it the laptop mic n speaker
>>>>> or the USB sound card) then only it works. The device gets listed but I am
>>>>> not able to playback from any device other than the default device.The
>>>>> following are the screenshots of my executed program.
>>>>>
>>>>> On Sat, Jan 16, 2016 at 10:52 PM, Ranjan <infibit <at> gmail.com> wrote:
>>>>>
>>>>>> And here is my code. I also tried to do a string compare and match
>>>>>> with device name from the device lists (the output from the pa_devs.c
>>>>>> program).Still cant connect to 2 devices or select 1 of them at random.
>>>>>>
>>>>>> On Sat, Jan 16, 2016 at 10:40 PM, Ranjan <infibit <at> gmail.com> wrote:
>>>>>>
>>>>>>> I ran the pa_devs program to get the device lists. Then I changed
>>>>>>> the device id in inputParameters.device = 1 to 14 but only one device works
>>>>>>> which is the default. Either the laptop mic works when USB soundcard is not
>>>>>>> connected or the Sound card works when connected but not the laptop mic and
>>>>>>> speakers.I am attaching the output of pa_devs program (which gives me
>>>>>>> result.txt).
>>>>>>>
>>>>>>> On Sat, Jan 16, 2016 at 10:37 PM, Robert Bielik <
>>>>>>> robert.bielik <at> dirac.se> wrote:
>>>>>>>
>>>>>>>> Hi Ranjan,
>>>>>>>>
>>>>>>>> It is perfectly doable. Just use Pa_OpenStream on each of the
>>>>>>>> different devices. Note that each of the streams will need to have their own
>>>>>>>> callback.
>>>>>>>>
>>>>>>>> Regards
>>>>>>>> /Robert
>>>>>>>>
>>>>>>>>
>>>>>>>> Den 2016-01-16 kl. 17:26, skrev Ranjan:
>>>>>>>>
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> I want to connect multiple USB sound cards and use them with
>>>>>>>> portaudio simultaneously. How shall I do this?I searched online but could
>>>>>>>> not find any useful information.Someone please help.
>>>>>>>>
>>>>>>>> Regards
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Portaudio mailing listPortaudio <at> lists.columbia.eduhttps://lists.columbia.edu/mailman/listinfo/portaudio
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Portaudio mailing list
>>>>>>>> Portaudio <at> lists.columbia.edu
>>>>>>>> https://lists.columbia.edu/mailman/listinfo/portaudio
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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Ranjan | 16 Jan 17:26 2016
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using multiple USB cards with port audio

Hello,

I want to connect multiple USB sound cards and use them with portaudio simultaneously. How shall I do this?I searched online but could not find any useful information.Someone please help.

Regards
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Ranjan | 16 Jan 10:02 2016
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using multiple USB cards with port audio

Hello,

I want to connect multiple USB sound cards and use them with portaudio simultaneously. How shall I do this?I searched online but could not find any useful information.Someone please help.

Regards
Ranjan
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Aashish Mittal | 3 Jan 13:21 2016
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Using Portaudio

Hi All,

I am working on a project wherein I intend to analyze a certain slice of an audio recording n an automated manner. The slice will be separated by 2 beeps around it (at start and end). Can Portaudio API be used to detect the beep and slice the section of audio and return that?

Thanks,
Aashish
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Michael Buckley | 30 Dec 18:43 2015
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Does anybody have the old SDK's? Mac user.

Hi, so I'm working through getting portaudio to work on my computer, which is a mac running OS 10.11 (el capitan), and by eric zhang's advice I likely need to have the old SDK's that came with older versions of xcode to make portaudio on my computer. 

I've looked on the internet and they don't seemed to be readily accessible.

Do any of you have the old SDKs to send me?
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Gmane