On 23/06/14 11:40, Daniel Drake wrote:
I tested ODROID-U2's 3.5mm analog headphone jack output with:
# speaker-test -c 2 -t wav -l 2
On my x86 laptop this command takes ~6 seconds and produces audible output: "Front left, front right, front left, front right"
When those words are reproduced over the speakers, there is a corresponding message printed to stdout which synchronizes nicely.
On ODROID-U2 the same command doesn't work quite right - execution takes only 3.5 seconds and the audible output is truncated: "Front left, front right, front" and the stdout messages do not really coincide with the audio being reproduced at that time.
No pulseaudio or anything like that.
Can you reproduce this?
I could reproduce such behaviour on the U3 board, but only with u-boot which sets the MPLL clock frequency (fout_mpll) to 880 MHz, rather than 800 MHz, which was the case in my original environment. All fout_mpll child clocks have then different frequency values in both cases. It's a bit strange though, because frequencies of all the audio subsystem clocks seem to be same anyway:
# cat /sys/kernel/debug/clk/clk_summary ... fout_epll 0 0 192000000 mout_audss 0 0 192000000 dout_rp 0 0 19200000 dout_aud_bus 0 0 19200000 mout_i2s0 0 0 192000000 dout_i2s0 0 0 192000000 sclk_epll 0 0 192000000 audss 0 0 192000000
So there might be some other difference I'm overlooking. Will let you know as soon I find out anything else.
Regards, Sylwester -- To unsubscribe from this list: send the line "unsubscribe alsa-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html