Hello Fons! Oct 16 2020, Fons Adriaensen has written: ...
1. The sensitivity of your headphone, that is the SPL for some given voltage. This may be in the specs of your headphone.
I think it is. ...
2. The 'gain' of your sound card at a particular DAC gain setting.
...
This could be measured (using an RMS voltmeter) with a know software generated signal.
I know someone with all kinds of meters like that. :)
3. How (2) depends on the volume settings (if any) of your sound card. If these are in dB and accurate (I wouldn't trust ALSA for this) that is easy.
I might start out by trusting ALSA. :)
4. The RMS level (in dB FS) of the signal you are playing. Zita-mu1 provides this but is probably of little use to you. What do you normally use for metering ?
Csound has lufs metering implemented now. I think it will do. At any rate, I'm looking at a constant signal, so that should be easy. Best wishes and many thanks, Jeanette
Ciao, -- FA _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
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