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Relay volume control + analog switch with zero crossing ...
https://www.diyaudio.com/community/threads/relay-volume-control-analog-switch-with-zero-crossing.350494/
The idea is that you start with the analog switch selecting Att. 1, this is your current volume setting. You then change the volume of Att. 2, when that is done you wait for the zero crossing and the analog switch now selects the output of Att. 2. Att. 2 is now selected and the volume level has now changed.
What is zero crossing in a signal ...
https://www.idsemergencymanagement.com/2020/02/12/what-is-zero-crossing-in-a-signal/
Zero crossings are a basic property of an audio signal that is often employed in audio classification. Zero crossings allow for a rough estimation of dominant frequency and the spectral centroid (SC) [52]. Zero crossing rate. Why are ZCR values higher in speech frames? Figure 4.4 presents a speech signal along with the respective ZCR sequence.
What Are Zero-Crossing Recordings? | Wildlife Acoustics
https://www.wildlifeacoustics.com/resources/faqs/what-are-zero-crossing-recordings
Because the zero-crossing format is only able to represent one frequency at a time, full-spectrum is particularly preferable for recording multiple sources of sound simultaneously, such as multiple bats vocalizing in the same area, or a single bat in a noisy environment. Song Meter SM4BAT ZC Song Meter SM3BAT
Zero Signal audio switching | Electronics Forum (Circuits ...
https://www.electro-tech-online.com/threads/zero-signal-audio-switching.4040/
No switching pops: 1) Make the inputs and the switch all have exactly the same DC voltage with coupling capacitors and a resistor to ground. 2) Fade the existing and new signals down to zero, switch the input then fade-up the new signal. Uncle $crooge Nigel Goodwin Super Moderator Most Helpful Member Nov 12, 2006 #13
MAX9670 Low-Power Audio/Video Switches with Audio …
https://www.maximintegrated.com/en/products/all-products/archive/MAX9670.html
The DirectDrive® output amplifiers create a 2V RMS full-scale audio signal biased around ground, eliminating the need for bulky output capacitors and reducing click-and-pop noise. The zero-cross detection circuitry also further reduces clicks and pops by enabling audio sources to switch only during a zero-crossing.
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