Mxr Carbon Copy Schematic -

However, the magic happens right after the buffer. You will see a network of capacitors and resistors that form a (a high-pass shelf). The Carbon Copy deliberately cuts bass and boosts treble before the delay chip.

On the schematic, trace the signal from the pre-emphasis filter. It goes into pin 1 or 16 of the NE570. This chip is brilliant because it contains both a rectifier (to measure the volume) and a gain cell (to turn it down). Here is the star of the show. The V3205SD is a 4096-stage BBD. The number "4096" matters. It means the maximum delay time is roughly half that of the old 1024-stage chips (like the MN3005), but it’s much quieter and easier to power. Mxr Carbon Copy Schematic

Unlike digital delays (which use AD/DA converters), BBDs sample the audio voltage and pass it down a chain of "buckets" (capacitors) at a specific clock rate. The faster the clock, the shorter the delay. The slower the clock, the longer (but dirtier) the delay. However, the magic happens right after the buffer

The delayed (and compressed/expanded/filtered) signal goes through the . This is a simple voltage divider. When the Mix is at noon, you have equal parts dry and wet. When it’s maxed, you have only the wet signal (great for using the pedal as a weird vibrato unit). On the schematic, trace the signal from the