nsf_classic is a format like your '[[nsf (format)[regular ol' NSF], except you can't use that DPCM channel you like so much. Have fun.

'[#[Tools]
Check out '[[nsf (format)] for a complete list.

'[#[Restrictions on submit]
The nsf_classic format is '[b]for '[[2A03 (soundchip)[2a03] only'[/b] with the additional restriction, that you can't use the DPCM-channel; DPCM is allowed in the '[[nsf (format)[nsf-format], expansions are accepted in the '[[nsfplus (format)[nsfplus-format].
That means, the only channels you may use for this format are Pulse 1, Pulse 2, Triangle and Noise.

The nsf classic format aims for a "classic" sound design and functionality-usage of the chip. This means '[b]no overclocking/higher refresh rates'[/b], '[b]no DPCM samples'[/b], and '[b]no use of the Zxx effect'[/b] (delta counter for DPCM). If you're using Famitracker, simply do not use the DPCM channel or change the refresh rate. Pulse 1, Pulse 2, Triangle and Noise only.

Additional specs for those making their own tools:  you must only use these 2a03 or 2a07 channels: pulse 1, pulse 2, triangle and noise. you must not update those channels more than once per NMI.

'[#[Accepted file format]
.nsf


'[b]that's all!'[/b]

no .ftm or .0cc - '[b]only .nsf !!'[/b]

'[#[Playback (for voting)]
There is a list with compatibility info '[l[http://famitracker.com/wiki/index.php?title=List_of_NSF_players[here]. 

'[#[See also]
- '[[nsf (format)]
- '[[2a03 (soundchip)] 
- '[[NES Famicom (console)]
- '[[nsfplus (format)]