On 2006-03-10, Grumble wrote:

I was wondering if there is a way of converting the speaker output of a
cassette player to a signal suitable for line-input of a PC audio card.

there's two potential problems.

1 the speaker signal level is too high for the line in

2 the speaker outputs may be bridged meaning they're not ground referenced.
also the soundcards aux input may not be ground referenced.

on the good side.
the PC's +12V supply should be compatible with the cassette player.

1 can be cured using resistors in a configuration called an L-pad

2 can be cured using an audio isolating transformer, two for sterio.

There is no headphone-out on the device. The intention is to fit a car audio
cassette player into the PC. Will it even fit?

I've not compared the din outline with a 5.25" half-height drive bay.
memory tells me they're about the same size, but I can't say for sure

FWIW the drive bay is 145mm accross and 41mm high,

Bye.
Jasen