setVolume doesn´t seem to handle discrete volume for each channel (Lilypad MP3)

[Anonymous]

Hello!

When using the MP3 Shield library for Lilypad Mp3 (SFEMP3Shield.h), and testing with the “Trigger” example, I have attempted to change the volume per channel in the line:

 

MP3player.setVolume(5, 30)

 

But for some reason volume is kept the same in both headphones (in this case, at 5)? Why is this?

 

Should I use separated speakers (LEFT SPEAKER/RIGHT SPEAKER) directly from their terminals in this Lilypad board? Or is it that I am just not seeing something really obvious within the code?

 

Thanks!

[Michael P. Flaga]

Please note there are three overloaded functions for volume

void SFEMP3Shield::setVolume(uint8_t leftchannel, uint8_t rightchannel);
void SFEMP3Shield::setVolume(uint16_t (leftchannel<<8)+rightchannel);
void SFEMP3Shield::setVolume(uint8_t ValueToBoth);

Described in the documentation, that can be found at

Additionally the following can impact how the VS1053 output the signal.

void SFEMP3Shield::setMonoMode (uint16_t);
void SFEMP3Shield::setDifferentialOutput (uint16_t);

Note that stock SFEMP3Shield library does not include an example called “trigger”. Only MP3Shield_Library_Demo.ino and FilePlayer.ino employ SetMonoMode and SetDifferentialOutput by use of a Menu.

Where all examples except that of WebPlayer.ino control volume via the use of

void SFEMP3Shield::setVolume (uint8_t leftchannel, uint8_t rightchannel)

 

 

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