/* filter_mapping
* The `filter_mapping` setting determines whether or not to use
* the "PeOPS" implementation of the SPU filter, or my own.
*
* The "PeOPS" implementation is faster, but lacks many effects,
* and is not an accurate recreation of audio from a PSX.
* Additionally, it can't produce proper 5.1 audio like the PSX
* SPU does (but UPSE does not yet support 5.1 output).
*
* However, if you have been a pirate all of your life, you will
* probably want "PeOPS" here because it is probably what you are
* used to (as it's used in most emulators).
*
* The "upse-ps2" implementation is theoretically bit-exact
* output comparable to an actual PS2 SPU. This includes the
* full PSX filter.
*
* Note that PSF2 support is not presently emulated due to too many
* undocumented instructions in both the BIOS and PS2 HAL.
*/
filter_mapping = upse-ps2;