setAudioOutputHighImpedance(true) eliminates all audio out

[william-orange]

I am using a small 3 watt amplifier chip to amplify the RDA5807 output to speaker level. I have found that the RDA5807 overdrives the input (only usable volume is one). I added a 10uf decoupling cap and a 3:1 voltage divider. The output impeadance of the voltage divider is around 10k. This works fine.

I though, perhaps, I could eliminate the passive components by using rx.setAudioOutputHighImpedance(true). When I add this to the setup all audio ouput is lost. I am using the RDA5807M variant (as opposed to the RDA5807P or something else).

Is there something wrong with the setAudioOutputHighImpedance function or does my chip just lack this capability?

Bill

[pu2clr]

Hi... Well, I need to check it out. Thanks for sharing this issue with me. Regards. Ricardo.

On Mon, Jun 24, 2024 at 11:48 AM william-orange @.***> wrote:

I am using a small 3 watt amplifier chip to amplify the RDA5807 output to speaker level. I have found that the RDA5807 overdrives the input (only usable volume is one). I added a 10uf decoupling cap and a 3:1 voltage divider. The output impeadance of the voltage divider is around 10k. This works fine.

I though, perhaps, I could eliminate the passive components by using rx.setAudioOutputHighImpedance(true). When I add this to the setup all audio ouput is lost. I am using the RDA5807M variant (as opposed to the RDA5807P or something else).

Is there something wrong with the setAudioOutputHighImpedance function or does my chip just lack this capability?

Bill

— Reply to this email directly, view it on GitHub https://github.com/pu2clr/RDA5807/issues/16, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAVSJNG4IUL2COLTBKY7NNTZJAWVHAVCNFSM6AAAAABJZ7RJV6VHI2DSMVQWIX3LMV43ASLTON2WKOZSGM3TANBVGA4DAMY . You are receiving this because you are subscribed to this thread.Message ID: @.***>

--

QRZ: http://www.qrz.com/db/PU2CLR Skype: ricardo_caratti Mobile: +55 61 981442296