156 Octave number Note 1 2 3 4 5 6 B 0 48 96 144 192 240 C 4 *52 100 148 196 244 *middle C C# 8 56 104 152 200 248 D 12 60 108 156 204 252 D# 16 64 112 160 208 E 20 68 116 164 212 F 24 72 120 168 216 F# 28 76 124 172 220 G 32 80 128 176 224 G# 36 84 132 180 228 A 40 88 136 184 232 A# 44 92 140 188 236 That completes the simple description of the SOUND command. There are two main areas where the SOUND command can be extended. First, instead of working with a fixed sound quality, one can select an ‘envelope’ to vary both the amplitude and the pitch of the note while it is playing; secondly it is possible to ensure that notes are synchronised so that chords start together.
In addition to these major extensions there are a number of other things that can be controlled, and these will be described later. If you wish to use an envelope to vary either the amplitude or the pitch of a note (or both) then you must first define the envelope and secondly, instead of using a fixed amplitude in the SOUND statement, you must quote the envelope number for A. Four envelopes are normally permitted and they are numbered 1 to 4. Thus SOUND 1,2,53,20 would produce on channel 1 a note of middle C with a duration of one second and the amplitude and pitch would be controlled by the envelope number 2.
The statement ENVELOPE is followed by 14 numbers and the following labels will be used for the 14 parameters.