# Commodore PET instrument editor the PET instrument editor consists of these macros: - **Volume**: volume sequence (on/off). - **Arpeggio**: pitch sequence. - **Waveform**: an 8×1 waveform, entered as a bitmask representing on-off pulses. this has nothing to do with wavetable assets, which cannot be used with the PET. - **Pitch**: fine pitch sequence.