If ever possible - and if I didn't forget to arrange it this way - the MIDI files have the solo voice on the right channel (or the left channel if your cables are not correctly connected) and the rest of the voices on the other channel. You can suppress the solo channel to a large degree if your sound producing device (amplifier) has a "balance" or "pan" control. Unfortunately many of the newer amplifiers (called "boom boxes" etc.) do no longer have a balance/pan knob.
A special hint for MacIntosh and Android users: these operating systems have no builtin MIDI players - when you play the MIDI files you hear nothing! I have started to convert some MIDI files to MP3 - but it will last some months until I have converted and uploaded them all. This situation is a shame for MacIntosh (Apple) and Android (Google): MP3 files can't be modified in the same degree as MIDI files. Normally they are two magnitudes bigger (factor 100 and more) than MIDI files.
The small Medley (MIDI and MP3 play along and scores above) with Songs by D.Reinhard and S.Grapelli is also played on an A clarinet.
And here is a sligthly modified version of my arrangement of the waltz "Vent d'automne" by E.Carrara. I have recorded the parts for piano, double bass and accordion with my synthesizer. The clarinet is played live with no modifications after the recording. You hear that it is never a good solution to be the recording engineer and the musician at the same time.
Here is a semi-classical piece by Paul Pierné: Sérénade. I play this on my soprano sax. The piano part comes from a MIDI file produced by me.
I play clarinet and saxophone in a small swing group called "Hot House". You can hear me here in a quartet setting recorded live. Musicians: Lukas Schmidt (bass), Uli Heim (git), Klaus Huckert (git), Edgar Huckert (clar). The title is "I'll see you in my dreams". Another title recorded with this same personnel at the same event is "Dinah".