This post is part of is an ongoing look between the sound output of various Sega Mega Drive-based devices (whether they are first party or 'clones'). The benchmark will be the PAL Sega Mega Drive II with an unmodified AV output, because this seems to be quite common (at least where I am from).
The Twin Pad Player (TPP) is a Sega Mega Drive-On-A-Chip (a Sega "clone") that has 20 games built in and is quite small in size (much smaller than a SMDII for example). It also features a cartridge input. This device was released in 2008.
In terms of source, I used the direct AV output.
The TPP is lacking in bottom end but seems to be a little clearer in the mid to high range. This clearness is also accompanied to some degree by added digital artifacts that seem to resemble alias frequencies or some other factor of playing back digital synthesis samples through a DAC.To put it frank, it sounds hollow and without soul. But that is a very, very subjective statement.
Another striking feature is the fact that the TPP is approximately four semitones lower than the PAL SMD II. The PAL/NTSC switch did not change the pitch at all.
The following examples have been normalised.
Sega Mega Drive II test example.
Twin Pad Player test example.