Support and General Use > Audio Playback, Database and Playlists

Resampling of low frequency audio podcast

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g.orlandini:

--- Quote from: saratoga on September 14, 2017, 02:11:32 PM ---
--- Quote from: g.orlandini on September 14, 2017, 01:07:25 PM --- If I understand well when I listen to a podcast with sample rate 11025 or 22025 I should set playback frequency to 44100, instead if 12000 or 16000 I should set it to 48000.
--- End quote ---

There is no reason to do that.

--- End quote ---

Do you mean, as gevaerts wrote, that there's no audible difference listening low quality audio if I set playback frequency at 44100 or 48000?


--- Quote from: saratoga on September 14, 2017, 02:11:32 PM ---
--- Quote from: g.orlandini on September 14, 2017, 01:07:25 PM --- If playback frequency is a multiple of audio frequency CPU time and quality loss is low.

--- End quote ---

I have no idea why people think this, but it is not true.

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I'm no expert I believe you.

What about battery consumption using low sample rate audio vs original audio @ 44100 128 Kbit?


--- Quote from: g.orlandini on September 14, 2017, 01:07:25 PM ---Sometimes I do resample/recode audio podcast to save space in my sansa clip (usually from mp3 2 ch 44100 128 Kbit to mp3 vbr9 1 ch 11025 @ 22-24 Kbit with no big audio quality loss) and I wonder if I the bigger CPU time used to resample from 11025 to 44100 is compensated with the smaller file size and less disk read time.

Thanks again

--- End quote ---

Thanks

saratoga:
If you're transcoding to save space, you can just use ogg and leave the sample rate alone.

I don't think there will be much difference in battery life either way, but you can test using the battery bench plugin to measure how long the battery lasts for any file type you have.

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