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The use of an XLR cord is a stroke of genius. Having the state of the machine clearly visible and manipulatable by people with fine motor problems solves 90% of
by zingplex 5y ago
The use of an XLR cord is a stroke of genius. Having the state of the machine clearly visible and manipulatable by people with fine motor problems solves 90% of the problems I encounter when volunteering with the elderly.
- mdtusz 5y agoIt appears to be using an 1/4" patch cord, not an XLR cable! XLR is the cable (and connector) with 3 pins as is used with microphones and carries a balanced signal - 1 leg is ground, then the other two are inverted signals to minimize noise.
- zingplex 5y agoYeah, you're right. My brain made the association between XLR and generic audio cables without thinking.
- Naracion 5y agoA single 3 pin XLR will only carry balanced signal for a single channel (which this might as well be). For stereo you either need two 3 pin XLR (as is the case for interconnects in high end or pro audio) or a single 4 pin XLR (as is found in high end headphones). The way it works is so simple yet genius. Say the main signal is +x. Then one of the pins will carry -x. At the end, the receiving end will invert -x and add the two signals together. This gives x + -(-x) = 2x. So it gives twice the power. Great. So what? Well, if you introduce noise into the chain, it gets canceled out! Pin 1: X + noise Pin 2: -X + noise Final = pin1-pin2 = X+noise + X-noise = 2X Brilliant.
- OJFord 5y agoBrilliant yes, but lest anyone think it's XLR-specific: https://en.wikipedia.org/wiki/Differential_signaling https://en.wikipedia.org/wiki/Differential_signaling I assume it's also the reason for 'bi-wire' speakers, while we're on audio gear.
- deleted 5y ago[deleted]