8 Aug
2019
8 Aug
'19
9:26 p.m.
On Thu, August 8, 2019 6:46 pm, crocket wrote:
* Does clock source matter if alsa_in resamples every
audio sample to jack
server's clock?
Yes, because the audio data has to be transferred through the audio
hardware and into the system memory without error before alsa_in (or
preferrably zita_alsa2jack) can resample to the jack clock. If your audio
interface is running from an internal clock source but attempting to read
data from S/PDIF there will be an error whenever the internal clock edge
is not lined up with the proper time in the S/PDIF data stream. There is
a way around that (essentially real time sample rate conversion in the
hardware similar to what alsa_in does), but it adds cost so is rarely
used.
Is it impossible to extract audio sample without
knowing clock?
Yes, clock management is a fundamental part of digital audio.
* How can I have my computer automatically switch
clock source between
SPDIF and internal?
I am not aware of a general way.
--
Chris Caudle