1.2 KiB
1.2 KiB
Yamaha YM2413/OPLL
the YM2413, otherwise known as OPLL, is a cost-reduced FM synthesis sound chip, based on the Yamaha YM3812 (OPL2). thought OPL was downgraded enough? :p
technical specifications
the YM2413 is equipped with the following features:
- 9 channels of 2 operator FM synthesis
- A drum/percussion mode, replacing the last 3 voices with 3 rhythm channels
- 1 user-definable patch (this patch can be changed throughout the course of the song)
- 15 pre-defined patches which can all be used at the same time
- Support for ADSR on both the modulator and the carrier
- Sine and half-sine based FM synthesis
- 9 octave note control
- 4096 different frequencies for channels
- 16 unique volume levels (NOTE: Volume 0 is NOT silent.)
- Modulator and carrier key scaling
- Built-in hardware vibrato support
effects
11xx: set feedback of channel.12xx: set operator 1 level.13xx: set operator 2 level.16xy: set multiplier of operator.xis the operator (1 or 2).yis the mutliplier.
18xx: toggle drums mode.- 0 disables it and 1 enables it.
- only in drums system.
19xx: set attack of all operators.1Axx: set attack of operator 1.1Bxx: set attack of operator 2.