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How to eliminate fade-in/soft start on TPA3116D2 board
How to eliminate fade-in/soft start on TPA3116D2 board
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Old 19th January 2019, 09:38 PM   #1
marklein is offline marklein
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Question How to eliminate fade-in/soft start on TPA3116D2 board

I recently purchased this guy and I'm loving the sound quality compared to my previous setup.

TPA3116D2 Bluetooth Digital Audio Amplifier Board DC12-24V 100W+50W+50W | eBay

Anyway, it has a very annoying "feature" where it ramps up the volume from silent when a signal starts. Presumably this is to reduce pops? I don't know, but it's WAY too aggressive. Any silence between parts of music or speech and it fades out... and back in again. Super distracting.

I read somewhere else (that I can't find any more) that bridging the ERP pads on the bottom would disable this but it didn't seem to have any effect on mine.

I'm sure somebody else here has bought a board that does this. Thanks so much for your help!
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Old 21st January 2019, 02:22 PM   #2
doctormord is offline doctormord  Germany
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Pictures without heatsink would help to see what's connected to the MUTS/SHDN pins.
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Old 23rd January 2019, 02:29 AM   #3
Think is offline Think  Netherlands
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How to eliminate fade-in/soft start on TPA3116D2 board
I have 2 boards like this but without Bluetooth and they don't have this problem. They do have 'anti pop' but that only works (fine) when turning on and off on my boards with the volume knob.
Do you have this problem with aux in and Bluetooth input or only with one of them?
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Old 23rd January 2019, 08:52 AM   #4
horst303 is offline horst303  Australia
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Oh I think I know what this is, its not a soft start circuit, its designed to mask the fact that the bluetooth module has a very high noise floor, so if you turn this off, presumably by reprogramming the bluetooth module, it'll be really noisy during quiet passages, it'll be cheaper just to get a different amp.
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Old 23rd January 2019, 07:16 PM   #5
marklein is offline marklein
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I think we're onto something. The AUX does not fade in. I wasn't using the AUX because the DAC on my Amazon Echo is total garbage, but BT audio is sent uncompressed.

I'll look into disabling this on the BT module, or just getting a new BT module. Thanks for the help!
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