pbg4 wrote: > Itried for quite a while today to produce the bass amp dropout with > different audio material on this radio, > but even after quite some time of testing could not provoke it, next > step here will be to put the patch on all the radios, > and check the hw version,.. I have made a modified sound effect. Using the on-board sound effect bump.wav as a base, I made one lasting for about one second. Then, while playing a 48,000 sample rate stream, I repeatedly press the back key and generate lots of (longer) bumps. At the same time, looking at the log with tail -f /var/log/messages.
>From time to time, various Alsa under-run messages appear. And, perhaps about once in every ten or twenty messages, I am rewarded with bass amp drop out. Patience is required. Sometimes you get lucky relatively quickly. After increasing the buffer size to 30,000 and the period count to 3 (from the default 20,000 and 2), I am unable, at least so far, to provoke the Radio enough to drop out its bass. I think the additional 10ms headroom provided by the extra buffer is just enough to allow it to ride through the storm. If you can find a better method to provoke it, please let me know ! Basically, I think the Radio has enough umph to play out any 48k stream that I have given it, keeping Alsa sufficiently supplied with frames. But it seems to get close to the edge when dealing with a sound effect. And, if it should fall behind and leave Alsa short of a frame or two, then the crossover (for reasons unknown) may sometimes/occasionally lock itself into silent bass. Note that the hardware bass channel is still functioning (in my experience), which you can verify by turning the crossover on and off. ------------------------------------------------------------------------ mrw's Profile: http://forums.slimdevices.com/member.php?userid=38299 View this thread: http://forums.slimdevices.com/showthread.php?t=104141
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