Re: [LAD] Call for testing: new ALSA driver for Digi 002/003 family - Linux-audio-dev

2 Apr 2015

On 02/04/15 11:28, Damien Zammit wrote:
...
  On 02/04/15 09:41, Takashi Sakamoto wrote:
  Several issues are still remained:
  * When allocates 2 or more channel numbers for the device, after 15 to
 20 seconds from playbacking, any PCM samples causes noisy sound. Then,
 all of LED on the front panel light. The streaming still continues
 correctly.  I have not seen this behaviour with your latest driver, Takashi.
 I think you would see this if the midi quadlet is confused with the pcm
 quadlets and you feed audio data into the midi port. (I have seen this
 before)

   * The actual effects of external clock source is
not clear. When set
 the clock source is somewhat external, even if stopping the clock
 source, the device continues to sound PCM samples against my expectation.  I have
successfully tested the device with ADAT and SPDIF sync. When I
 connect external clock source to the SPDIF-in port and send
 0xffffe0000118 1 the SPDIF led light turns on and the streaming now
 syncs to the new clock.  A flashing Sync led means that the sample rates
 are mismatched and the sync is not working correctly.  But sync works
 well when sample rates are matched.

 I tried 0x011c but I am not convinced that this is related to ADAT at
 all.  I think it is a switch to select the mode of SPDIF between
 consumer and pro SPDIF modes?  I am guessing here but SPDIF sync no
 longer works when I toggle the mode to 1, and it has no effect when I
 attach ADAT cable and sync to ADAT, then toggling the mode does nothing.

 Damien