AMSTRAD CPC464 User Manual page 121

When the flush bit is activated with a channel(s) the SOUND put through with the flush is
excecuted immediately leaving the queue empty and the head of the channel inactive. Any SOUNDs
currently being played are terminated.
H: Tone Period
Value range 0....4095
default if omitted : none ( mandatory entry )
Enters a period that sets the frequency of the SOUND to be played (pitch of the note). The frequency
can be evaluated from the formula :
frequency = 125000 / period
By using 0, no frequency is set, this is most useful where only a ' noise' is required.
I: Duration
Any integer value in the permissable range -32768....+32767
default if omitted : 20
For values greater than zero the value entered represents the duration in l/100ths second. When
equal to zero, the duration is governed by the length of the volume envelope specified.
Where the duration is less than zero, the positive value of this number gives the number of times the
volume envelope specified should be repeated.
J: Volume
An integer value in the range 0....15 (0.. . .7 where no volume envelope is specified)
default if omitted : 12 (4 where no volume envelope is specified)
This is the starting volume, it can be altered by the volume envelope if one is specified. Zero is no
volume.
K: Volume Envelope
An integer value in the range 0....15
default if omitted : 0
The value used specifies a pre-defined envelope. To define an envelope use the ENV command. A
permanent definition is volume <envelope number> 0, this cannot be changed by the ENV command
and is set to 2 seconds constantly at the ' volume level' .