16 Oct
2020
16 Oct
'20
8:24 p.m.
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
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