1Soundboard 2========== 3Do you want to just jam with some digital tunes? Now you can! 4 5This sample demonstrates how to obtain the lowest latency and optimal computational throughput by: 6 71) Leaving Oboe to choose the best default stream properties for the current device 82) Setting performance mode to LowLatency 93) Setting sharing mode to Exclusive 104) Setting the buffer size to 2 bursts 115) Using the `-Ofast` compiler optimization flag, even when building the `Debug` variant 12 13The [following article explaining how to debug CPU performance problems](https://medium.com/@donturner/debugging-audio-glitches-on-android-ed10782f9c64) may also be useful when looking at this code. 14 15Implementation details 16--- 17The stream properties are left to Oboe as such the app must output audio data in a format which matches that of the stream. 18 19Four different formats are supported: 20 21|Channel count|Format| 22|-------------|------| 23|1 - Mono|16-bit int| 24|2 - Stereo|16-bit int| 25|1 - Mono|Float| 26|2 - Stereo|Float| 27 28The signal chain for mono streams is: 29 30 SynthSound->Mixer 31 32For stereo chains a mono to stereo converter is added to the end of the chain: 33 34 SynthSound->Mixer->MonoToStereo 35 36The compiler optimization flag `-Ofast` can be found in [CMakeLists.txt](CMakeLists.txt). 37 38Each SynthSound is a series of 5 Oscillators, creating a pleasant sounding note when combined. 39 40There are 30 notes, corresponding to G3 to C6, moving left to right, top to bottom. 41 42In order to determine whether a note should be played, MusicTileView demonstrates how to keep track of where each finger is. 43 44Images 45----------- 46 47
