Running multiple Stereo feeds to a PI5 with two Sabrent adapters.

[krnd2]

I have a pi5 and I have successfully loaded the Broadcastify Pi Image v3.0 Beta. I have two of the Sabrent USB External Stereo Sound adapters. Eventually I will have two receivers fed into the left & right of one of the adapters (right channel being receiver A and left channel being receiver B), and a third receiver fed to both channels of the second adapter. I will be providing two feeds (one stereo, one monorail) to Broadcastify. Issues so far:

1. On a test, the audio is distorted. I used the Bcfy shell to configure the feed. I don’t see a way to adjust gain for a channel. Do I just use Alsamixer?
2. I am currently only providing one channel to the first adapter, but the audio is found on both the right and the left channel of the feed. I have not found where the default is set to a monoral feed.
3. The total buffering between the PI5 and Broadcastify is over 60 seconds and sometimes more than 90 seconds. I see in the Darkice config the default buffering is 10 seconds. I can change that to 5, maybe. But getting the delay between when I make a change in the receiver until I hear it on the broadcastify feed to well under 60 seconds would be nice.
4. When configuring my feeds via the Bcfy shell, I have the following sources available:
   • [1] PulseAudio Loopback 1
   • [2] PulseAudio Loopback 2
   • [3] Device [USB Audio Device]
   • [4] Device_1 [USB Audio Device]

I have only been able to configure [4] with a feed. Maybe [3] will not work until [4] is already configured and feeding???? Does anyone have experience with two feeds from one Raspberry Pi?

 

[DC31]

1. On a test, the audio is distorted. I used the Bcfy shell to configure the feed. I don’t see a way to adjust gain for a channel. Do I just use Alsamixer?

try turning your radio volume down also.

1. I am currently only providing one channel to the first adapter, but the audio is found on both the right and the left channel of the feed. I have not found where the default is set to a monoral feed.

your darkice configuration files are in the bcfy/configuration folder on the pi. Here you will find channel settings for both input and output. For stereo Channel=2.

1. The total buffering between the PI5 and Broadcastify is over 60 seconds and sometimes more than 90 seconds. I see in the Darkice config the default buffering is 10 seconds. I can change that to 5, maybe. But getting the delay between when I make a change in the receiver until I hear it on the broadcastify feed to well under 60 seconds would be nice.

latency is what it is. You aren’t going to significantly affect it. If you really want low latency, look at setting up a Zello feed. Latency is in ms.

1. When configuring my feeds via the Bcfy shell, I have the following sources available:
   • [1] PulseAudio Loopback 1
   • [2] PulseAudio Loopback 2
   • [3] Device [USB Audio Device]
   • [4] Device_1 [USB Audio Device]

I have only been able to configure [4] with a feed. Maybe [3] will not work until [4] is already configured and feeding???? Does anyone have experience with two feeds from one Raspberry Pi?