ymf795 Yamatake Corporation, ymf795 Datasheet - Page 15

• Manufacturer Part Number: ymf795
• Description: Apl-2 Automobile Sound Player-2
• Manufacturer: Yamatake Corporation

YMF795
VIB : Vibrato
EGT : Envelope waveform type
AR3 - AR0 : Attack Rate setting
DR3 - DR0 : Decay Rate setting
RR3 - RR0 : Release Rate setting
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.
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.
“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.
“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.
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
• Sustained sound: Decaying time from the end of the sound generation.
286 ms (time taken from 0 dB to -48 dB) after the end of the sound generation.
EGT=0 Decaying sound
Length of
Sound generated
Length of
Sound generated
EGT=1 Sustained sound
AR
AR
DR
DR
-15-
RR
RR
0dB
SL
0dB
SL
When SUS=ON
When SUS=ON
-
-48dB
48dB