Audio Difficulty with Pi 2x Board

[Dan, KG7PAR]

Hi Jeff,

Are you measuring the input audio on the resistor at Q1/Q2 or the unconnected pad? If using the unconnected pad then you wont see any audio, its actually a gpio signal. Be sure to measure on the 0 ohm resistor that shorts the traces together. The Q1 and Q2 were meant to be a hardware audio lockout feature that never really worked right so we just removed the feature.

Dan

[Jeffrey, WB9OUF]

Thank you Dan,
After trying everything I described above. I employed my favorite line from the movie “Contact”
“All things being equal, the simplest answer is usually the correct one”, In my case it simply involved disabling “Flat audio” After doing that everything worked, and levels where easily adjusted.

One thing, my audio an echo-like quality to it, is there a way to “tweak” audio quality, and is it easily explained?

Thank you again,
73 Jeff-WB9OUF

[Dan, KG7PAR]

Jeff, can you please do a quick recording of the audio so I can hear the echo effect. This isn’t normal sound behavior.

Support at ics-ctrl dot com

Thanks
Dan

[Jeffrey, WB9OUF]

Have an audio file from my phone, how do I attach it to this message?

[Aaron, N3MBH]

Jeff,
Received your audio file and sent it on to Dan and Joe to check out. What type of radios are you using. Are you or have you tried running the transmitter into a dummy load directly. To me it almost sounds like an RF issue getting back into the audio.

73,
Aaron – N3MBH / WRFV871

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[Aaron, N3MBH]

Or a ground loop of sorts.

73,
Aaron – N3MBH / WRFV871

OpenRepeater is offered free of charge. Find out how you can support us.

[Jeffrey, WB9OUF]

Hi Aaron,
I am communicating directly with Dan at ICS support, please loop in with him in that I have the feeling that everything is somehow inter-related. Thank you for all the good suggestions, I hope we all together can resolve this situation.
The Raspberry Pi/2x combination is and will continue to be an excellent controller platform with incredible expansion possibilities.

73,

Jeff-WB9OUF

[Jeffrey, WB9OUF]

Hello Aaron and Dan,
Between the two of you, is there anything I could try, or is it software. I really don’t think it’s stray RF, in that the Repeater is in one package and very well shielded. Coax is double-shielded with short runs to the duplexer. Mostly, it wasn’t present with the internal controller active.
Are there any software adjustments that can be made that could affect a correction?

73,

Jeff-WB9OUF

[Aaron, N3MBH]

Have you pulled the TX side off the duplexer and just went straight to a dummy load just to rule RF out? Worth a try. I have had RF get into the Pi and audio lines before and cause havoc.

73,
Aaron – N3MBH / WRFV871

OpenRepeater is offered free of charge. Find out how you can support us.

[Phil G0EPX]

I have the same problem
my setup is 1) Raspberry Pi 3b+
2) ICS Pi 2x Controller board
3) 32 Gb San disk Micro SSD
Software:
1) OpenRepeater program version#2.1.2
The audio has a echo when in use but the voice announcements are perfect which would suggest there is a problem with the audio input.

The repeater has been working well with old logic board so i know the rx tx is all ok
73s
Phil G0EPX

[Author]

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