SimpleYMF825

Simple YMF825 driver for Arduino

Pin assignment

The following pin assignment is for Arduino UNO. Please check your Arduino's pinout for SPI port (MOSI, MISO, SCK).

• 9: RST_N
• 10: SS
• 11: MOSI
• 12: MISO
• 13: SCK

SimpleYMF825::begin (drv_sel)

Begins SimpleYMF825.

drv_sel: IO VDD voltage

• IOVDD_5V: for 5V MCU (e.g. Arduino UNO)
• IOVDD_3V3: for 3.3V MCU (e.g. Arduino DUE)

SimpleYMF825::keyon (ch, octave, key, vol)

SimpleYMF825::keyon (ch, octave, key)

Start the channel sound.

ch: channel number (0-15)

octave: octave number (1-8)

• Middle C belongs to octave 4.

key: key name (0-11)

• KEY_C = 0
• KEY_C_SHARP = 1
• KEY_D = 2
• KEY_D_SHARP = 3
• KEY_E = 4
• KEY_F = 5
• KEY_F_SHARP = 6
• KEY_G = 7
• KEY_G_SHARP = 8
• KEY_A = 9
• KEY_A_SHARP = 10
• KEY_B = 11

vol: channnel volume (0-31)

vol	channnel volume
0	mute
1	-47.9dB
2	-42.6dB
3	-37.2dB
4	-33.1dB
5	-29.8dB
6	-27.0dB
7	-24.6dB
8	-22.4dB
9	-20.6dB
10	-18.9dB
11	-17.3dB
12	-15.9dB
13	-14.6dB
14	-13.4dB
15	-12.2dB
16	-11.1dB
17	-10.1dB
18	-9.2dB
19	-8.3dB
20	-7.4dB
21	-6.6dB
22	-5.8dB
23	-5.1dB
24	-4.4dB
25	-3.6dB
26	-3.0dB
27	-2.3dB
28	-1.7dB
29	-1.1dB
30	-0.6dB
31	0.0dB

SimpleYMF825::keyoff (ch)

Stop the channel sound.

ch: channel number (0-15)

SimpleYMF825::setTone (ch, tone)

Sets tone for the channel.

ch: channel number (0-15)

tone: tone number (0-15)

SimpleYMF825 provides 16 preset tones. These tone data are designed by YAMAHA.

• GRAND_PIANO = 0
• E_PIANO = 1
• TENOR_SAX = 2
• PICK_BASS = 3
• TNKL_BELL = 4
• NEW_AGE_PD = 5
• BRIGHT_PIANO = 6
• VIBES = 7
• CHURCH_ORGAN = 8
• FLUTE = 9
• ROCK_ORGAN = 10
• NYLON_GUITER = 11
• SQUARE_LEAD = 12
• SAW_LEAD = 13
• HARPSICHORD = 14
• HARMONICA = 15

SimpleYMF825::setKey (ch, octave, key)

Sets key for the channel.

ch: channel number (0-15)

octave: octave number (0-7)

key: key name (0-11)

SimpleYMF825::setVolume (ch, vol)

Sets volume for the channel.

ch: channel number (0-15)

vol: channnel volume (0-31)

SimpleYMF825::setMasterVolume (vol)

Sets master volume.

vol: master volume (0-63)

The master volume applies all channnels.

vol	master volume
0	mute
1	-50dB
2	-49dB
3	-48dB
...	...
61	+10dB
62	+11dB
63	+12dB