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Build r3120 and above [[FCEUX]] as of FCEUX allow 2.2.3 includes an overclocking option which works by adding extra additional scanlines to the PPU loop. This method doesn't cause audio distortion. It is found under Config > Timing. [[puNES]] as of 0.101 includes the Timing menu and same feature. It is found under Tools > PPU Hacks. [[Mesen]] as of 0.2.2 includes the same feature, as well as CPU overclocking. Both are found under Options > Emulation > Overclocking. For PPU Overclocking, the number of added additional scanlines is user definabledefined. <ref name="FCEUX Overclock">https://sourceforge240 Post-render Scanlines should be more than enough for most games. If you happen to experience issues with a PPU overclock, try the VBlank Scanlines options instead. Though uncommon, this is required for some games, a notable example being Contra Force.net/p/fceultra/code/3120/</ref>
→NES: Revised information on FCEUX PPU overclocking and added information about PPU/CPU overclocking in both puNES and Mesen.
Overclocking is possible on real hardware, but doing so also speeds up the audio unless you're using a special hardware mod like the HiDefNES which does allow for overclocking without changing the audio pitch<ref name="HiDefNESoverclock">https://youtu.be/QnQuBN3iYVA?t=4m8s</ref>.
==SNES==
