Usage: wav_apss (source wav file) [threshold]

The music tape for BASIC-M25 demonstration and Moon Child has 2 channels.
The left channel is a degital data for APSS,
and the right channel is for a analog music data.
This utility is to cleanup the left channel for EmuZ-2500.

BASIC-M25̕t^f⃀[`ChŎgp鉹ye[v́A
ɓop̃fW^f[^AEɉyL^Ă܂B
{c[́A̍̃mCY邽߂̂̂łB
