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TOPIC: Audio clicks with squelch

Audio clicks with squelch 05 Aug 2022 10:02 #1

  • hari
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Hi Sunsdr OMs,

when using SQL on ExpertSDR2, I do get audio clicks sometimes when it crosses the squelch level (both directions). Tried with CW and SSB. Not always, but very frequently. It's the same on my main Linux box and on my Macbook. So likely not operating system or hardware related. Any ideas how to suppress those clicks?

73 Hari
vy 73 OE6HKE
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Audio clicks with squelch 05 Aug 2022 15:44 #2

  • John-KC2QMA
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I think the Attack (open) and Decay (close) times are to short causing the clicking sound.
I believe if they can add a few millisecond of attack rise time to the squelch gate would fix the audio clicking sound. Basically a softer open and close action to the gate.
Maybe that is already fixed in V3?
Transceiver: MB1 Prime 2021
HF Amplifier: Ameritron AL-1200
HF Antennas:10-80 Vertical, 10-80 Fan Dipole
VHF Antenna: Commet GP-9
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Audio clicks with squelch 05 Aug 2022 18:17 #3

  • John-KC2QMA
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Also try to raise your buffer setting up a click or 2 in the sound card menu and see if that helps.
Transceiver: MB1 Prime 2021
HF Amplifier: Ameritron AL-1200
HF Antennas:10-80 Vertical, 10-80 Fan Dipole
VHF Antenna: Commet GP-9
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Audio clicks with squelch 06 Aug 2022 01:38 #4

  • VK6NX
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"Clicks" or "crackling" or "cracks" related to audio stream are exactly HW/OS/networking drivers related. There are few topics on forum and requests on Github were posted over last year. Just search it.

ESDR2 - the only you can do is try to set the networking to achievable minimum latency and prioritise ESDR2 traffic (where OS allows). Cannot do better with ESDR2 at this stage.

Issue is fixed (well... 99%, as there are some very specific conditions, when you can make "cracks" happen) in latest ESDR3.A, hence ESDR3 release will not have this problem.
Last Edit: 06 Aug 2022 01:39 by VK6NX.
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