PCM2903C: Change PCM2903C initial volume

Fabio Gou

Expert 3365 points

Part Number: PCM2903C

Tool/software:

How to change PCM2903C initial volume in Windows 11/10?

It is always set at 100 when Windows10 PC is connected for the first time.

Immediately, a connection notification tone will be heard.

Especially when sound is playing, Max volume is loud and startling.

We want to change it to 50 or something, Is it achievable?

13 days ago

0 Mir Jeffres 12 days ago

TI__Expert 3750 points

Hi,

This would be a Windows driver setting to set the default volume, which may be complicated, can you turn down the volume once it is connected and see if it stays low when you disconnect and reconnect? Here is a resource about default volume setting: https://learn.microsoft.com/en-us/windows-hardware/drivers/audio/customizing-default-audio-volume-settings

You could also try to mute the device on initialization, the HID0 pin controls the mute function. Is this an option?

Best,
Mir

0 鑫邓 12 days ago in reply to Mir Jeffres

Prodigy 10 points

Hi， Jeffres， This initial volume of 100 occurs the first time a Windows 10 connects to PCM2903C, or the first time connected after PCM2903C hardware is removed from the device Manager. Then turn down the volume and disconnect and reconnect PCM2903C, the windows stays low. Since we don't have a volume adjustable resistor and don't use HID interface, this initial value is important to us. Thanks

0 Mir Jeffres 11 days ago in reply to 鑫邓

TI__Expert 3750 points

Hi,

From reading some windows forums, it looks like this cannot be easily changed without a new driver. You can edit the default volume levels for new devices with the INF wrapper in the article I sent earlier (https://learn.microsoft.com/en-us/windows-hardware/drivers/audio/customizing-default-audio-volume-settings) but this would involve writing your own driver for the device. I believe the device doesn't have a specific driver because it acts as a class compliant audio device, so you would need to edit your computer's defaults. It may be easier to implement the hardware HID mute rather than changing your computer's audio drivers. You could also implement a switch to disconnect the DAC outputs until you are able to turn down the volume on the computer?

Best,
Mir

0 Mir Jeffres 14 hours ago in reply to Mir Jeffres

TI__Expert 3750 points

Hi,

I just discovered this (third party) software called Sound Lock, it looks like it is a compressor for all sounds that go through your Windows computer before they are sent out of the DAC, so enabling this may help you as a backup for the Windows default volume being so high. I saw it and remembered this thread, I hope it helps! Here is the link: https://www.3appes.com/sound-lock/

Best,
Mir

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PCM2903C: Change PCM2903C initial volume