This post is a buying request in a technical audio/hardware forum. The user is looking to purchase a DSPiy unit with a D-IN module or just the D-IN port separately, mentioning that they found a DSPiy V1 listing on Leboncoin. It’s essentially a trade/classified-style message asking if anyone has the ...

This post is a technical DIY discussion about designing a relay-based input switching system for a preamplifier, likely using a small microcontroller (IC) instead of a mechanical rotary switch; the author describes a setup where multiple audio inputs (RCA/XLR) can be selected via push buttons, with ...