Ha-ha! :-) Actually I badly know English. I use the program - translator (PROMT) In the previous message I have strongly exaggerated. Certainly the tape recorder or radio do(make) noise much more strongly, than MD. In general I think, noise is in the majority of audiodevices. Quality of sound MD very high. H'm.. I hear noise of amplifier MD only in plug-in headphones and in very silent room. Noise is, but weak. It not a problem. As to noise of a mechanical part of the device. In MZ-RH910 there is no built - in microphone, there is a socket for connection. It is possible to arrange a microphone so that any noise from MD it was not audible.