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Re: audio sink "working" at 400Khz


From: Jeff Long
Subject: Re: audio sink "working" at 400Khz
Date: Thu, 16 Dec 2021 21:28:43 -0500

The system's audio library (e.g., ALSA) is being smart and doing the resampling for you.

On Thu, Dec 16, 2021 at 2:07 PM Fernando Peral <fernando@samara.com.es> wrote:

I have used this example as a problem to my students to work on decimation

The source file was an interpolated version of a song at 400K saved with a file sink, and I have tell them that the source was sampled at 400K, the audio card should work at 16K.....  so the obvious thing yo do was downsample x25 ..... but as I did not say this last part and the obvious was not obvious for some of them they did something like this

Apart from the unnecessary throttle, I don't think the audio card of the PC can work at 400Ksps so I haven't tried it, but when they did it the music sounded well in the computer, the question is why?









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