slartibartfast wrote:
> This might be a waste of time but I thought I would use Deltawave
> software to compare the Squeezelite output waveforms at a series of
> volume levels from 100% to 10%.
> I know volume in the Squeezebox universe is done at 24 bits but where is
> the output converted back to 16 bits? If I save the output of
> Squeezelite using FFMPEG (as described in another recent Deltawave
> thread) I get a 16 bit file so presumably this is the information the
> DAC receives.
> I have read that volumes down to 40% have no audible effect in theory
> (for 16 bit files) so this is my misguided attempt to quantify it
> [emoji3]
>
> Sent from my Pixel 3a using Tapatalk
I've never used the Deltawave software, but when you record from a
device you usually have to specified the samplerate, bits and channels.
If you enable squeezelite logging level info or higher the output format
is reported at startup.
Code:
--------------------
squeezelite -o hw:CARD=Intel -d all=info
[05:54:24.435635] alsa_open:425 opened device hw:CARD=Intel using format:
S32_LE sample rate: 44100 mmap: 1
[05:54:24.435675] alsa_open:516 buffer: 40 period: 4 -> buffer size: 1764
period size: 441
--------------------
If you're capturing the output from squeezelite through stdout then you
have to specify the bit depth using the -a option, otherwise the default
is 16.
Code:
--------------------
-a <f> Specify sample format (16|24|32) of output file when using -o -
to output samples to stdout (interleaved little endian only)
--------------------
Ralphy
*1*-Touch, *5*-Classics, *3*-Booms, *2*-UE Radio
'Squeezebox client builds'
(https://sourceforge.net/projects/lmsclients/files/) 'donations'
(https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=LL5P6365KQEXN&lc=CA&item_name=Squeezebox%20client%20builds¤cy_code=USD&bn=PP%2dDonationsBF%3abtn_donate_SM%2egif%3aNonHosted)
always appreciated.
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