Attach a RØDE Lavalier II to the AI Micro and plug in a simple pair of wired earphones. If you’re taking part in a TV program or a video podcast, all you need to do is connect the AI Micro to the computer or device that’s running Zoom or whatever platform is being used to connect to the meeting. This is an ideal setup for hearing your own voice while recording so you can even overdub a music track and lay down a new track without any delay.īack to my broadcasting scenario. The entire audio signal is fed to the connected headphones with zero latency. The headphone jack outputs sound from the host computer as well as any sound picked up by connected microphones. The AI-Micro also has two 3.5mm jacks for connecting to two lavalier microphones and there’s a third 3.5mm jack for attaching a pair of headphones or earbuds. It takes just a couple of seconds to set up and there are no drivers required with Windows, macOS, Android or iOS devices. The AI-Micro appears in the host computer as sound input and output sources. It has a USB-C port that connects to a computer, smartphone or tablet. I could be fooling myself but it sounds a little odd to me.The RØDE AI-Micro is a small device about half the size of a very slim box of matches. I am not a fan of the charge amp with a limited openloop gain stage. The bootstrapped drain in one of the akg 414 first stages is interesting for an older design. I cleaned up the flux saw a few things I would change however, the circuit sounds good stock. This surprised me I bought a few for the bodies and left them stock. The MXL CR89, 890, and two more models have a nice circuit design. This thread is interesting I like the circuit design(without the boost) ![]() The output looks like it might be a rail to rail op amp impedance balanced and I would guess the input is nicely design input follower. I have to admit I was defeated by the epoxy? coating when trying to trace it) I was wondering what the tube sound circuit(if it has one) was that looks like it is under the epoxy. I have been finding transformerless circuits more interesting Things like Neumann, TLM170, TLM67(I asked a member about pictures of the PCBs and they sent some to me. I would not call them a tube replacement more of what is "good" about solid state and tubes in a transformer out microphone. So I built a few solid state tube voltage transformer out circuits for fun. I am a little bored with tube to transformer out microphone circuits they are kind of easy to build and often work. I suppose you could double up on the J-Fets if the capacitance isn't too high and you need it to be about the same noise figure as without the diff-amp. I'd certainly think about adding a follower to a transformer coupled gain stage myself.ĭiff-amp - yep we have around 3dB more noise. ![]() Is that a good thing? I suppose it depends what the user wants. Years ago, I was testing one of the Cinemag replacement mic transformers that are typically driven from an anode or drain.Īs one would expect, driving the transformer from a low source Z follower reduced transformer distortion on the bottom end. Having a discrete power supply too rather than running off phantom opens up all sorts of possibilities. In a microphone where you'd probably be running it naked (or at least not part of a high OLG amp), then I see it as a good thing to consider using. ![]() The only problems I've found with CFP/Sziklai pairs is possible instability when it's part of a global feedback loop. I haven't analyzed your circuit Gus, but appreciate the desire to encourage folks to not just build one of the usual circuits out there, also that you post ideas here for discussion.Įven without doing analysis, I'm sure what you did post is a perfectly good circuit.
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