Volume Envelope; Tone Envelope; Noise; Creating A Volume Envelope - AMSTRAD cpc 6128 User Instruction

Volume Envelope
To make the volume vary within the duration of the note, you can specify a volume
envelope using the separate command EN V. You can in fact make a number of
different volume envelopes, and like the SOU N D command, each has its own
reference number. If you have created a volume envelope with a reference number of
1 , and you wish to use it in a SOU N D command, then where the parameter <volume
envelope> is required, type in 1. Creating
a
volume envelope will be explained
shortly.
Tone Envelope
To make the tone or pitch vary within the duration ofthe note, you can specify a tone
envelope using the separate command ENT. You can in fact make a numher of
different tone envelopes, and like the SOU N D command, each has its own reference
number. If you have created a tone envelope with a reference number of 1, and you
wish to use it in a SOU N D command, then where the parameter <tone envelope> is
required, type in 1. Creating a tone envelope will be explained shortly.
Noise
<Noise> is the last parameter ofthe SOU N D command. A range of noise is available by
varying the <noise> parameter between 1 and 3 1 . Add a <noise> parameter of 2 at the
end of the SOU N D command and listen to the effect. Then change the <noise>
parameter to 27 and listen to the difference. Type in:
10 sound 1,239,200,15",2
Note the two 'blank' parameters (",) before the <noise> parameter of 2. This is
because we haven't created a <volume envelope> nor a <tone envelope>.
Creating a Volume Envelope
The volume envelope command is EN V. In its simplest form, the command has 4
parameters: The command is typed in as:
ENV <envelope number> , <numberofsteps> , <size of step> , <time per step>
As before, let's look at the parameters one by one.
Chapter 1 Page 70
Foundation Course