Hi Rob, CM109's show up with a different description. Here's one that have: Bus 002 Device 014: ID 0d8c:000e C-Media Electronics, Inc. Audio Adapter (Planet UP-100, Genius G-Talk) There were some marked as CM119's. They cause the same symptom. It was worth checking. 73, Dave WA1JHK On 4/1/2019 6:46 PM, Rob Noll wrote:
Hi Dave,
As requested, output is below. I’m confused how this might help with audio quality issues – do you mind telling me what sort of clues one would look for?
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 0d8c:013a C-Media Electronics, Inc.
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Rob
*From:*App_rpt-users <app_rpt-users-bounces@lists.allstarlink.org> *On Behalf Of *Dave Maciorowski *Sent:* Monday, April 01, 2019 20:17 *To:* app_rpt-users@lists.allstarlink.org *Subject:* Re: [App_rpt-users] USB fob choppy/stuttering audio
Hi Rob,
Please copy the output from your lsusb command to a reply email. There may be a clue there.
Thanks.
Dave WA1JHK
On 4/1/2019 2:14 PM, Rob Noll wrote:
Hi Marshall,
Thanks for the thought, but it happens with both a transmitter and with a headset.
Rob
------------------------------------------------------------------------
*From: *
Marshall Oldham ke6pcv@cal-net.org <mailto:ke6pcv@cal-net.org>
*Sent: *
April 1, 2019 16:10:38
*To: *
'Users of Asterisk app_rpt' app_rpt-users@lists.allstarlink.org <mailto:app_rpt-users@lists.allstarlink.org>
*Subject: *
Re: [App_rpt-users] USB fob choppy/stuttering audio
Rob,
Based on your comments about the telemetry "not sounding choppy when listening to it over the phone."
It could be that RF from your transmitter is getting into your sound fob. Do you have a transmitter hooked up to the USB sound fob?
As a test, disable your transmitter and use clip leads to connect a PC amplified computer speaker to your TX audio line and see if you still have choppy audio.
If you do NOT have choppy audio with the amplified speaker, this surely points to some type of RF getting into your sound fob.
Hope this helps.
73
Marshall - ke6pcv
*From:*App_rpt-users [mailto:app_rpt-users-bounces@lists.allstarlink.org] *On Behalf Of *Rob Noll *Sent:* Sunday, March 31, 2019 7:26 AM *To:* app_rpt-users@lists.allstarlink.org <mailto:app_rpt-users@lists.allstarlink.org> *Subject:* [App_rpt-users] USB fob choppy/stuttering audio
Good morning all,
I’m trying to set up an AllStar node using a USB fob based on the CM119 chip. I’m having issues with choppy/stuttering audio, particularly on telemetry. It’s bad enough that it renders the CW ID meaningless.
My original thought was lack of CPU power, but I have tried it on a Raspberry Pi 2, Pi 3, and several virtual machines on a quad-core PC with identical results. Also, the choppiness is NOT as bad when using the full USB driver instead of SimpleUSB, which I believe conclusively rules out CPU power.
I’ve also tried a powered USB hub, thinking that the USB device was not receiving enough power, with no improvement.
I’ve used the Android mobile app to connect to the node, and the telemetry does not seem to be choppy when listening to it over the app. While I need to do some more testing to say this conclusively, I do believe at this point that my issue is narrowed down to the USB fob itself and/or the specific audio stream being sent to the device.
I’m currently searching for a way to alter the sample rate that ASL is sending the audio to the device in.
Has anyone experienced this, and does anyone have any suggestions?
Thanks and 73,
Rob, WX1N
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