sndconfig is a native RH app. In Mandrake you have other tools, sndconfig can be used, however the tools available to you from Mandrake should suffice.
FYI, Mandrake uses ALSA by default. Sometimes ALSA comes muted by default. You may simply need to unmute your device.
Also, if you have questions specific to your soundcard, you should post up what soundcard you have. If you aren't sure, you should post up:
Which will show you what soundcard you have.