I experience the same issue while using RTCM’s, an altogether different audio interface. The issue typically resolves on its own. While not an answer to your question, it does further support the issue. 

Hello, ... 

Issues with audio on ASL 1.01 GIT version 004b9dd

Usually issue clears up after reboot, was happening every few months, now seems every day/few days... 

This does not appear to be network issue, as ID's and courtesy tones, local audio files, are also impacted.

Using DSP aka usbradio

issue is heard even via phone portal

using standared URI

Single Node

4.9.0-6-686-pae Kernel

Intel Atom CPU 1.8Ghz

2GB Ram

SSD

load average: 0.12, 0.07, 0.02

Logs show:

[Jan 27 11:55:49] WARNING[372] chan_usbradio.c: Loaded parameters from usbradio_tune_usb_27038.conf for device usb_27038 .

[Jan 27 11:55:49] WARNING[370] chan_usbradio.c: Possibly stuck USB read channel. [usb_27038]

[Jan 27 11:55:49] WARNING[370] chan_usbradio.c: Nope, USB read channel [usb_27038] wasn't stuck after all.

[Jan 27 11:55:49] NOTICE[372] chan_usbradio.c: USB Adapter has no EEPROM installed or Checksum BAD on channel usb_27038

Dmesg:

[  314.006920] perf: interrupt took too long (2507 > 2500), lowering kernel.perf_event_max_sample_rate to 79750

[  366.570103] perf: interrupt took too long (3169 > 3133), lowering kernel.perf_event_max_sample_rate to 63000

[  429.870947] perf: interrupt took too long (3963 > 3961), lowering kernel.perf_event_max_sample_rate to 50250

I have been restarting weekly, and the issue is only getting worse, any thoughts?, Is there a newer version of ASL?

Thanks,

Mark

<rpt-audio.m4a>

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