I get these things not for monitoring, but like most people, (Technomoan) I'm in it cus I like to see the visualization aspect of the music. This is going to have to make me take a second look at the LED VU meter I have. are welcome.Īny donations are much appreciated using : It is just too broken.Īs always, questions, comments, recommendations, etc. Sadly, as much as I love VU meters, I can't recommend the Douk VU2. Its input needs to be buffered and high impedance to avoid this. I was concerned that this thing would do the same and it does. I remember building a blinking disco light to the tune of music when I was 10 years old and it too distorted the heck out of the input when connected. I did not measure this but just turning it on and tapping on it and such, it seemed to produce a movement on the VU meter.Īh, what a missed opportunity to build a decent VU meter. Maybe you have a buffered output in your pre-amp or something but if you don't, watch out.įortunately this thing also has a Microphone that can sample the audio that way. So not only can't you use this as a switcher, but you can't use a wired connection to sample your audio as that distorts that source. In other words, the VU2 is severely loading down the AP output causing such significant amount of distortion! I treated the unit like a pre-amp and fed it 2 volts and got this: I used a high power one I have for RPi computer boards. They give you a USB cable but no power supply. In case you are wondering, that USB connection is for power. I got most of the range from minimum to just hair above. Strangely, even the green LED above it would do the same! The gain setting was also not linear. At some settings of gain the meter with a steady signal would jitter back and forth. In use, I found the Gain control and output to be quite erratic. And nicely so, there is AGC (automatic gain control) so it can optimize the movement for you. This is essential in my view to get reasonable movement out of them. The gain control is again for the meters. I say "fast" in quotation mark because typical of these meters, it is slow to begin with. All the way to the left is "fast" and to the right, slow. Delay is not delay but filtering of the VU meter. They do NOT operate on the signal itself but the action of the meter. More confusing are the front panel controls. How could one channel be in, and the other out? Then I realized it is bi-directional and can form 4 to 1 or 1 to 4.
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