Signal converting systems for use in stereo reproducing systems

摘要

A signal converter is provided for intermixing first and second audio signals reproduced from a conventional 2-channel recording medium to produce two difference signals which are supplied to a 2 to 4-channel converter for improving the separation between the front and rear signals. The signal converter may be constructed to mix together first and second audio signals at a variable relative amplitude ratio therebetween and with a variable polarity relationship to form two sum signals or two difference signals.