> Good luck and let us know if you succeed.
Hi Luis,
thanks for the response ! I followed your link and noticed that you
experience the same in/out-delay (~ 15ms) with USB-soundcards. I'm a little
surprised because Emagic claims to reach delay in the area of 6ms under
Windows (ASIO) but I'm wondering if it's true.
Actually it seems to me that the delay details are a pretty "wishy-washy"
issue - some questions regarding this :
1.) Can anyone recommend literature/links for soundcard DSP and
construction ?
2.) summing up the delay types there's
ADC-delay, blocking-delay, DAC-delay
For the caputure process it's ADC+blocking (for 48kHz, 256 samples/frame =
1ms (ADC)+ 5.6ms (blocking) = 6,6ms
Assuming that the captured block would be inserted into the playback buffer
at the right time it wouldn't take any delay for playback process, right but
since it's a problem to get the buffers in sync it typically takes another
6,6ms to play it back, right = so altogether = 2 * 6,6ms = 13,2 ms
in/out-delay. Is that correct ?
3.) Has anyone information about the communication layer USB-audio puts on
top of the PCI-bus and how much delay it takes ? In other words : Can a USB
device ever reach latencies like PCI-devices ? Also : I need an excellent
external device for my laptop. If USB isn't suitable what's the alternative
(Firewire, external PCI-Cards : which ones ?).
Thanks in advance
-- A l e x
--
Dipl.-Ing. Alexander Carôt
Email : [EMAIL PROTECTED]
Tel.: +49 (0)177 5719797
phd-candidate at www.isnm.de
DSL-Aktion wegen großer Nachfrage bis 28.2.2006 verlängert:
GMX DSL-Flatrate 1 Jahr kostenlos* http://www.gmx.net/de/go/dsl
-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems? Stop! Download the new AJAX search engine that makes
searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642
_______________________________________________
Alsa-user mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/alsa-user
