[LAD] simulating analog audio devices

Robin Gareus robin at gareus.org
Fri Jun 1 12:46:49 UTC 2007

Erik de Castro Lopo wrote:
> Robin Gareus wrote:
> When Spice loads the libsndfile component, can the component find out
> the inter-sample period used by Spice? 

no. Spice does not use a constant interval; else it would be straight
forward to use libsamplerate.

> If the above is not possible, I suggest that you up sample the audio 
> by say 128 times and then linearly interpolate to get whatever inter
> sample values you need.

sounds like a great idea.

I should do that with the output too, but it's a little more complex
there: In the beginning I've tried to take the average for all the
"spice"-samples matching the corresponding audio-sample. I've only tried
that up to 1/(4*Fsample) and it gave much worse results than just taking
the closest sample...  - combining interpolation and resampling could be
the solution.

now that I've got the framework, I'll dig into the details..


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