Mute when volume = 0

[GlebDen]

Hello. According to the RDA5807 documentation, the volume should be muted when set to 0. "When 0000, output mute and output impedance is very large" Do I understand correctly?

[pu2clr]

I used the register 02, bit 14 for muting (0 mute and 1 normal operation).
It works on Digital (i2S) and Analog modes. If you want to use mute via set volume, just call setVolume(0). Right?

[GlebDen]

If I call setVolume(0), then the radio continues to play as if it is a minimum volume like setVolume (1)

[pu2clr]

I think there is an interpretation problem with the text of the Documentation. DAC Gain Control Bits (Volume) - 0000=min; 1111=max. Volume scale is logarithmic. When 0000, output mute and output impedance is very large. Should be "output mutes"? . Or "Output mute" impedance is very large when 0000?

[GlebDen]

Logically, any radio will have silence in the most minimal position of volume.

[pu2clr]

I see... well, in this case, it is up to the developer to decide what best applies to the project. You have the mute function by using setMute(true). If you want total silence, I think the setMute function this is more recommended than setVolume(0). Said that, consider, via programming, testing the volume. When it is 0 (getVolume() is 0) then setMute(true), otherwise setMute(false). I think it will do what you want. Right? This library is just a communication layer for the RDA5807 device. It is not intended to change the original functions of the device in this layer. It can be done during the final project programming.

[GlebDen]

Yes, I think you're right.

[pu2clr]

I fixed some bugs today. The setMute function was modified. I also added the function setAudioOutputHigZ. Both functions deal with audio output and mute the receiver.

[GlebDen]

Thank you! This is like an offtop, but can I suggest adding a choice of an antenna type? Or make reg05-> refined.lna_port_sel = 3; by default.

[pu2clr]

I have just implemented setLnaIcSel and setLnaPortSel. I have not tested it so far. Also I did not selected 3 by default for while due to legacy applications (I need check it before). Can you check these functions and share the results with me? Thanks.

[GlebDen]

Hello. I tested Setlnaicsel and Setlnaportsel. Setlnaportsel definitely works fine. Setlnaicsel I could not understand the changes by ear. Can this affect the RSSI level?

If we return to the initial discussion, then my main idea that I wanted to express is that setVolume(0) gives me a very comfortable low volume level. setVolume(1) is already quite loud to me. Perhaps because of my headphones, I don't know for sure yet.

[pu2clr]

To be honest I have no idea what the LNA IC SEL (Setlnaicsel) really do. I could notice here that the LNA PORT affect the RSSI. I have the same opinion about the volume. I think it is not recommended for using in a real application. I'm not sure. It is better to control the volume with a audio amplifier module. I mean, I think we should use a fixed volume in the RDA5807 or use its high impedance setup to be processed with a good audio amplifier. Thanks for testing.

[pu2clr]

I'm closing this issue. Please, few free to open a new one if you need. Thanks.