Unsupported operation

[SandeepJagdev]

hello, everytime i am going to add effect on A2DP it shows unsupported operation in serial monitor. my code is
#include "AudioTools.h"
#include "AudioLibs/AudioKit.h"
#include "AudioLibs/AudioA2DP.h"

// Audio Format
const int sample_rate = 44100;
const int channels = 1;
const int bits_per_sample = 16;

int16_t tremoloDuration = 5;
float tremoloDepth = 0;
Tremolo tremolo(tremoloDuration, tremoloDepth, sample_rate);
BluetoothA2DPSink a2dp_sink;
AudioKitStream kit;
// Access I2S as stream
AudioEffects<GeneratorFromStream<effect_t>> effects(kit, channels , 1.0); // apply effects on kit
GeneratedSoundStream<int16_t> in(effects);
StreamCopy copier(kit, in); // copy in to kit
// Write data to AudioKit in callback
void read_data_stream(const uint8_t *data, uint32_t length) {
in.write(data, length);
}

void setup() {
Serial.begin(115200);
AudioLogger::instance().begin(Serial, AudioLogger::Warning);
effects.addEffect(tremolo);
tremolo.setDepth(80);
tremolo.setDuration(1000);
tremolo.setActive(tremoloDuration>0);
// setup output
auto cfg = kit.defaultConfig(RXTX_MODE);
cfg.sd_active = false;
kit.begin(cfg);
// register callback
a2dp_sink.set_stream_reader(read_data_stream, false);
a2dp_sink.start("AudioKit");
}
void loop() {
kit.processActions();
copier.copy();
}

If this is not correct method for generate audio-effect then how can i apply echo using stk on kit .

[pschatzmann]

I suggest that you follow the advice given in the Wiki

Just a couple of comments:

• The read_data_callback is supposed to provide the requested data, so I would expect to see a read and definitly not a write
• Double check if you need some special logic to handle the number of channels: A2DP needs 2 channels.