1 Make some raw PCM audio
Each key adds a half note (1 second at 120 bpm, 4/4) to the melody. The melody is synthesized, scaled to the peak level you choose, and stored as 44.1 kHz, 24-bit, stereo PCM.
Which frequency is each key?
Equal temperament with A4 = 440 Hz: each key is 21/12 (about 1.059) times the frequency of the key a semitone below, so every octave doubles the frequency. Black keys are not on this keyboard but still count as semitones. Frequencies in Hz:
Next: the graph below stays in place while you scroll the controls under it.
2 See the result
Graph options and sample readout
| Peak | RMS | Peak 24-bit code | Sample L (code / float / dBFS) | Sample R (code / float / dBFS) | |
|---|---|---|---|---|---|
| Original | |||||
| With FxSound |
3 FxSound controls
Same controls, ranges and steps as the FxSound app. Power off takes FxSound out of the audio path, exactly as the app does, so you hear the original.
Effects
10-band equalizer
Equalizer settings
4 Isolate a processing stage
FxSound runs these stages in this exact order on every buffer of audio. Untick a stage to remove just that stage and see (and hear) what it was doing. These switches exist only in the tutorial.