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Gear / Technical Help => Recording Gear => Topic started by: justme on November 02, 2021, 11:16:53 PM

Title: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: justme on November 02, 2021, 11:16:53 PM
Rode is realising an interesting universal USB interface based on the iOS only SC-6L.
The AI-micro is I’ll be usable for pretty much anything with USB.

https://rode.com/interfaces-and-mixers/ai-micro

Specs: https://edge.rode.com/pdf/page/1871/modules/4638/AI-Micro_datasheet.pdf
https://rode.com/blog/all/introducing-the-ai-micro-ultra-compact-dual-channel-interface

Key Features of the AI-Micro
 
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on November 03, 2021, 01:47:06 AM
$70 bucks for this. I'll grab one once they're available. Game changer if it works as described.

"The device features two 3.5mm inputs for independently recording via a pair of microphones, and one of these inputs can automatically detect when a single stereo microphone is used instead." From techradar

https://www.techradar.com/news/rodes-new-ai-micro-turns-your-phone-into-a-portable-audio-recording-studio
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: aaronji on November 03, 2021, 10:06:28 AM
I wonder what the plug-in power voltage is? I couldn't find that anywhere.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on November 03, 2021, 10:32:47 AM
Probably 3v or so. I would assume that you'll need a battery box.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: goodcooker on November 03, 2021, 11:35:25 AM

Tiny, inexpensive, made by a reputable company...


We have come a long way in the less than 20 years I've been recording.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on November 03, 2021, 11:53:36 AM
https://www.youtube.com/watch?v=9_jt8PRrzOs&ab_channel=R%C3%98DEMicrophones
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: dactylus on November 04, 2021, 09:40:10 AM

Very interesting.  What phone app would you use to adjust and monitor record levels?

Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: goodcooker on November 04, 2021, 10:41:34 AM

Very interesting.  What phone app would you use to adjust and monitor record levels?

This would certainly work https://www.rode.com/software/reporter_app but I'm curious as well about compatibility with other apps especially Android.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: SMsound on November 04, 2021, 08:36:23 PM
100dB of dynamic range, versus e.g. 142dB on a MixPre. My guess is that this was intended for dialogue/interviews/Zoom, where I expect a tiny interface would be a nice upgrade over stock laptop/phone hardware, but classical music at least would benefit from more dynamic range.

Also, it maxes out at 48kHz---again, great for dialogue/Zoom/interviews (and obviously great if you have the very best top shelf equipment) but most of us want more on a cheap interface for music.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: Ozpeter on November 08, 2021, 09:58:58 AM
I've just ordered this to go with my shiny new highly expensive DJI Action 2 video camera.  Unlike most such small cameras, this one doesn't use a proprietary interface for getting audio into its USB C port, but anything that works with Android  or PC will do.  I've used it with a audio technica ATR2x-USB interface, and it also works with the Zoom F1 and H1N and no doubt the rest.  The camera itself has remarkable built in mics - 4 of them - which provide almost a binaural immersive sound.  It's like a Zoom H2N in a way, except it does excellent video as well.  I think the Rode interface will be somewhat larger than the camera...

I'll report on how this goes in due course.  Mics will be Roland binaural or Sennheiser stereo shotgun.

Thanks to the OP for the heads-up!
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on November 10, 2021, 01:02:15 PM
I just pre-ordered one from Sweetwater. Let us know how it goes for you, Ozpeter. B&H says availability is the end of December.

If this works out, I'll have an ultra low profile setup. MKE2 (from the gopro deal, permanently mounted in hat) > homemade "ugly" battery box > Rode AI-Micro > phone
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: Ozpeter on November 10, 2021, 05:10:50 PM
I ordered from a company about 25 minutes away, express delivery.  They sent it from a warehouse in another state, parcel post, delivery might take until the end of next week!  Grrr.  Meanwhile I checked a local high-end video equipment sales company ten minutes away and they have it in stock... so I'm due to collect one from there this afternoon, and I hope to get a video online very soon.  It will mainly be concerned with interfacing with the DJI Action 2 but of course I'll also do a quick test with Android and iPhone devices too.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: Ozpeter on November 11, 2021, 04:04:49 AM
Bad news... Rode have stuffed this up.  It's a fantastic device except - when you connect a stereo mic and configure it appropriately in the app, it only works on the left channel, unless it is a self powered mic.  In other words, the plug in power is only supplied to one capsule.  Doh.  So it won't work with my Roland binaural mics, for instance, which was probably my prime reason for purchase.  I have yet to check it with a voltmeter, but I'm 99% sure that's what they have done.  I had a long talk on the phone with a Rode tech person and he was puzzled, so they may not realise what they have done because... Rode don't sell stereo mics needing PiP as far as I know.  But let's face it, every portable recorder on the planet supports such stereo mics, so really they can't say people don't need it.

At least it does work with my DJI Action 2 camera...

[Edit - plug in power does appear on both sides, so now I'm puzzled as to why it won't work with stereo mics.  I think it was 2.8 volts.  Same voltage shows when using mono mics on the mono configured inputs.]
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on November 16, 2021, 11:24:34 AM
Apologies if I misread your post - Have you tested it with stereo microphones using external power (like a battery box)?
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: Ozpeter on November 16, 2021, 05:21:49 PM
I've tested it with a Sennheiser stereo shotgun which has its own battery, and it's fine with that.

https://youtu.be/gZPbYP3TYK4
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: Ozpeter on November 27, 2021, 02:47:57 AM
Briefly, if you connect a PiP stereo mic to a 3.5mm > 3.5mm female>female adapter and then to a Rode SC11 splitter lead to channels 1 & 2 - so it thinks it's got two mono mics connected for stereo input - it works.  I'[m hoping the Rode will fix this with a FW update...
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on December 15, 2021, 11:44:11 PM
Peter, have you tested the Reporter app much? I'm wondering if there is a time limit.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: Ozpeter on December 16, 2021, 07:41:27 PM
No, sorry, I've mainly been using it for video with the Action 2 camera.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on February 03, 2022, 02:12:53 PM
My unit was shipped yesterday. Hopefully I will be able to test it soon.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on February 08, 2022, 12:47:17 PM
The unit just arrived and upon plugging it in, it automatically connected to the Rode app I had preinstalled. I used the output of my baby nbox into input 1 and it was recognized as a stereo input once I selected it on the app.

The app has 24 db of gain and records at either 24 bit 48khz or compressed 48khz 128, 256, or 320kbps mp3. Optional high pass filters are at 75 and 150 hz.

I will test it soon as a backup rig but the test file I made earlier pulled up as a stereo file in Audacity. My only worry right now is with phone battery life - I may get a cheap android just for recording in the near future. Also, I don't like that you have to export your recordings to the cloud. I need to find where in the file system it is saving them so I can export manually.

https://imgur.com/a/WSoP6YG
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on February 09, 2022, 04:34:15 PM
I have tested the device and it works well as long as you keep the screen up. However, on my S9+, once I tap the power button to turn off the screen, the levels drop dramatically and seconds later completely shut off. I do not want to keep the screen on while the device is in my pocket and there is no lock option to use while doing so.

I sent in a service request to Rode but this does not bode well for the device.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: Ozpeter on February 10, 2022, 06:20:33 AM
I will try to test mine in this respect.  Have you tried different recording apps?
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on February 10, 2022, 08:58:25 AM
I will try to test mine in this respect.  Have you tried different recording apps?

I have tried pretty much all of them on Google Play. The only one that works correctly with the stereo mode is Rode Reporter. Even the Shure Motiv app will not recognize the stereo pair.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: Ozpeter on February 10, 2022, 05:05:57 PM
As memory serves me, one of my two phones won't record in stereo from USB-C, the other will.  I really must retest to remind myself.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on March 04, 2022, 03:56:54 PM
Coming back to this...I just got a new iphone so I thought I would try it out before I absolutely hit the return deadline.

This thing works like a charm with Apogee Metarecorder, recognizing the stereo input and all. All of the problems I was having before are nonexistent now. I tested it with my Videomic Stereo and with a 3.5mm out from my Mixpre 6 and it recognized stereo on both with no dropouts or volume adjustments when the phone went to sleep.

I have a show coming up on Saturday that I will try and get some samples at.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: Ozpeter on March 07, 2022, 06:00:58 AM
I'm glad you finally got a good result!
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on March 11, 2022, 03:36:29 AM
I'm glad you finally got a good result!

Thank you. I think Android is too finicky for them to bother perfecting...

Bias on these is 2.8v on both channels.
Title: Re: Rode AI-Micro Ultra-compact Dual-channel Interface
Post by: DavidPuddy on April 12, 2022, 05:17:49 PM
I've tested this at a few shows now using the stereo out on my mixpre and it's done a really nice job with Metarecorder app. If you want to get into streaming or want a super low-pro recording option and have a battery box, I would definitely recommend this piece of gear.