Subject: Re: [LAU] jackd version 0.116.1 - sampling rate of 44099 hz?

From: Justin Smith <noisesmith@...> · Date: Monday, July 20, 2009 - 12:03 am

On Sun, Jul 19, 2009 at 5:00 PM, Paul Davis wrote:

quoted text> On Sun, Jul 19, 2009 at 7:26 PM, Justin Smith wrote:

>> I have an ensoniq audiopci card that I have been using successfully at

>> 48000 hz for a while now. I have just started working on a project

>> with prerecorded material at 44100 hz, so I reconfigured jack in order

>> to avoid needless sample rate conversion. Somehow jack thinks that my

>> card is running at 44099 hz, so it is resampling the source material

>> anyway.

>>

>> Why would my card be running at 44099 hz, is this a software or

>> hardware problem? I am going to just edit the wav headers to say 44099

>> so they agree with the engine sample rate for now, but would be

>> interested to know what the source of this weirdness would be.

>

> its reported by the ALSA driver, which in turn is written based on

> information available about the h/w. its debatable what ALSA should

> report in these situations, but its a driver-level issue, and not

> something in JACK's domain.

>

> JACK does NOT resample audio, ever. neither does ALSA if you use the

> hw:N device(s).

>
Sorry, I was conflating jack and ardour, I meant that ardour was

wanting to resample.
I used sox to copy the audio files to .raw, and then converted the

.raw files to .wav at 44099 sampling rate. I had a suspicion it may

have been the alsa backend, thanks for the info.

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