Echo Mic Circuit Diagrams. This echo circuit using ic 4558d for additional amplifier and ic pt2399 as a based. This one was manufactured in the 90s by sadelta of spain and is still in production and to buy under the name of galaxy echo master plus classic quite rare for an almost 30 years old electronic device.
An astonishing feature of this design lies in the fact that a complete stereo mixer as shown below in the block diagram draws less than 6ma current. 28 microphone preamplifier design 129th aes convention nov 2010. Simple block diagram microphone signal levels vary widely due to.
2 microphone preamplifier design 129th aes convention.
Connect the output of digital echo to input of stereo. 28 microphone preamplifier design 129th aes convention nov 2010. Echo mic circuit diagrams pdf echomic8632pdf download echo mic circuit diagrams pdf. The aims is smoothing the voices with echo.