YMF795 Datasheet, PDF (15/45 Pages) YAMAHA CORPORATION – APL-2 Automobile sound Player-2

YMF795
VIB : Vibrato
This bit is used to set ON/OFF of vibrato function. “0” for OFF, “1” for ON.
The vibrato frequency is 6.4 Hz and the modulation depth is ±13.47cent.
EGT : Envelope waveform type
This bit is used to select the type of the envelope waveform.
“0” for the decaying sound and “1” for the sustained sound.
Envelope waveforms shown below are for the decaying sound and sustained sound.
EGT=0 Decaying sound
DR
AR
Length of
Sound generated
EGT=1 Sustained sound
DR
AR
Length of
Sound generated
0dB
SL
RR
When SUS=ON
-48dB
0dB
SL
RR
When SUS=ON
-48dB
AR3 - AR0 : Attack Rate setting
“Attack Rate” is a time interval from the time sound starts generating (-48dB) to the time sound reaches at the
maximum volume (0dB). The table on the next page is shown as the time taken from -48dB to 0dB.
DR3 - DR0 : Decay Rate setting
“Decay Rate” is a time interval taken for decay from 0 dB to the time it reaches at the Sustain Level (SL). The table
on the next page is shown as the time taken from 0 dB to -48 dB.
RR3 - RR0 : Release Rate setting
Definition of the Release Rate differs between decaying sound and sustained sound.
• Decaying sound: Decaying time from the Sustain Level to the end of the sound generation. The sound decays taking
286 ms (time taken from 0 dB to -48 dB) after the end of the sound generation.
• Sustained sound: Decaying time from the end of the sound generation.
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