Actions speak louder than words, so here are some examples of what we can do.
These are just ordinary mp3 files, available by clicking on the planet.

Even records in very poor condition, such as this one, can be restored to near master-tape quality.
Give us your warps, your mold, your huddled wrecks of albums yearning to breath free. LP's in this condition won't sound great, but at least it'll be tolerable.
A typical "45" from the 1950's, before and after.
Many cheap cassettes are now on year 30 of their ten-year life, and starting to sound like this.
A reel of tape in very deteriorated condition, from a radio station archive project. A total wreck, it would not even play after baking. But where there's a will, there's a way. And there's plenty of will around here.
Wilcox-Gay Recordio, from 1940. The recording level was so weak the surface noise is actually louder than the voices.
This reel of tape was stored in a barrel outdoors in Louisiana for 20 years. There was nothing left of this reel but brown spaghetti, the sound is a bit wobbly.
The condition of this cardboard WW II "voice letter" was dismal, yet even from this we were able to recover the audio. You can click here to see the actual record.
Wire recording from around 1950. The fidelity of our solid-state wire playback system can't be matched by any vintage tube-powered wire recorder.
Combine a cheap cassette recorder with 3-for-a-dollar dime store tape and you end up with this. We can get them sounding much better, here's one example.
78's have the undeserved reputation of sounding terrible, but that's because they often don't get restored properly. This is what a 78 should sound like.