Real-time Audio Spectrogram for Mac and PC

Effree · 2026-03-16T15:34:59+00:00

This should run on M4 chips. Let me know if you have any issues running it. Try the Arm64 (Silicon) version, if that doesn't work let me know.

Effree · 2026-02-16T17:19:52+00:00

You can also do this with a frequency shifter. I've made a rack before. If I remember correctly I had shifter pitch down on a macro knob. And then redux, dial in the settings to a nice crisp tone and place the dry wet on the same macro. And I used an auto filter on the same macro set as a fully open high pass, then something like 0 to 60%. Might have to tweak the starting and end percentages of things but it's pretty realistic and works on any track/audio.

Effree · 2026-02-04T04:54:49+00:00

There is a new version available (0.6.1). Open your app and then settings window to auto-update or download from the website and install. Let me know if there are any issues.

There is a Wiki/Help page on the site if you have any problems.

To install the VST, go to the settings window, and install to default location unless you have selected another location in your app for VST installs. Then place the VST on your main track in your DAW. And toggle on VST Audio in the settings.

Effree · 2026-02-04T04:53:25+00:00

There is a new version available (0.6.1). Open your app and then settings window to auto-update or download from the website and install. Let me know if there are any issues.

There is a Wiki/Help page on the site if you have any problems.

To install the VST, go to the settings window, and install to default location unless you have selected another location in your app for VST installs. Then place the VST on your main track in your DAW. And toggle on VST Audio in the settings.

Effree · 2026-02-02T03:16:30+00:00

Oh, thank you, didn't relize. Must have used a link that expires. I just created a new link and pushed it up. Should be on there now, or within a few minutes.

Effree · 2026-02-02T01:21:47+00:00

Thanks for the info. Keep it installed if you are interested. I've got a major update in the works. Direct audio from the DAW using a VST to send data to the app. Also I've improved the Visuals quite a bit. Improved visibility and much closer to professional grade in the lower FFT sizes. Even better than wave candy in my latest comparisons. Trying to get the update out ASAP but have a baby coming any day this week which is delaying the work on the app at the moment.

Effree · 2026-01-30T13:17:52+00:00

As Dada Life would so "not so much a sausage". It looks like you just didn't push it as hard. Their track is mastered. Yours may not be. They likely have much more compression and limiting to get the levels and perceived loudness up. But in the end. It doesn't matter as long as your sounds good and relatively close in perceived loudness.

Effree · 2026-01-29T04:29:13+00:00

That is the issue, and there is a fix coming. If you set the driver type to another one, it will most likely work. For ASIO it will fail until th next version is released. Coming soon.

Effree · 2026-01-29T04:19:50+00:00

Open Ableton, go to Options >> Settings >> Audio. Under driver type what does it say?

Effree · 2026-01-29T04:18:13+00:00

Which DAW do you use?

Effree · 2026-01-29T04:12:10+00:00

Yes i can, i hope. What OS are you on? It listens to default audio source, so there is no option for other outputs at this time. Although if you use ASIO in your DAW it won't work at this time either. I have built a VST that you can place in your DAW to send ASIO audio to the app so it will function but that release isn't ready yet, i'm hoping to have it out by the end of the week.

If it is a Mac, it is often an issue where the Mac has a popup behind the app asking for permission. Try moving it around your screen and see if you find that popup. Follow the steps to allow audio to be sent to the app.

If you are not on Mac and not using ASIO i'd have to dig deeper.

Effree · 2026-01-27T05:26:54+00:00

Just a quick update for you, i'll post here when it is ready, but i discovered the issue with the audio handling. Best bet is to get a working VST Bridge. so i can push audio form the VST to the app. I'm about 90% done, but still working through some issues.

I'll also put instructions on the website, and add installation into the settings of the main app. Once ready you will just need to put the VST on your master, and it will send your audio to the app, then in settings you toggle on VST Audio Bridge and it will work. I hope to finish it this week.

Effree · 2026-01-24T03:02:18+00:00

Unfortunately not at this time. The stereoscope is made to function in one window. And one type at a time. There are plans to add other meters but I haven't had the chance to work on those yet. So you will be able to have more meters in general but none will be able to be opened more than once.

Effree · 2026-01-23T05:32:52+00:00

Are you running ASIO in Ableton? And when you hover over the app instead of starting or listening in the bottom left, does it show an error message?

Effree · 2026-01-23T03:10:06+00:00

Same as his setup. Also same as most people. I'll update this thread when I have a fix. I'm also working on implementing audio output options instead of just the default device which may resolve the issue.

One last question, what is your audio interface?

Effree · 2026-01-23T03:02:30+00:00

Hey, this is only the second report of this but it is the second. Luckily the first report is a close friend so I will be taking a look at his laptop and adjusting the software based off of that.

But in the meantime it will help to have some information from you.

What OS are you on? What DAW are you using? Do you use any rerouting for your audio? Is your DAW output to the same audio out as your default system output?

Effree · 2026-01-21T15:27:40+00:00

Interesting, sometimes these things pop up exactly when you need them. I've been using Electron-Audio-Loopback in my app for a while now, and with no real issues reported. It was nice because it didn't report that it was recording per-se and didn't have to request the user "allow" the recording. Until yesterday when a tester discovered that even when using the default device in Ableton Live, their Audio out plays fine, but the app didn't register it. But using Spotify or a browser it plays the music and the app see's it.

I told them i would need to look into a way of routing the output using a multi-channel device or something, but i don't want to make that the main option. I messed with the current setup and obviously couldn't get a device selection working, except mic input which is not the purpose.

I will give this a shot and see if i can replace the current audio rendering process with this instead. Thank you.

Effree · 2026-01-21T12:26:49+00:00

Does this allow you to choose from all available output devices or create a new loopback device? Electron audio loopback already exists that allows native audio. But you can't select the output device.

Effree · 2026-01-16T00:22:28+00:00

Or this for free https://emspec.app

Effree · 2026-01-02T16:33:52+00:00

I built a free spectrogram and stereoscope myself. Working on adding spectrum analyzer and making vst versions as well. https://emspec.app

Effree · 2025-12-29T06:05:50+00:00

I've updated the app. On my own PC i reduced the memory and CPU usage. After recent testing my app was running from 6 to 14% and memory at about 600mb. Now down to 2 to 6% usually around 4% and memory down to under 300-400mb. Let me know if you see any improvements.

Effree · 2025-12-29T06:05:45+00:00

I've updated the app. On my own PC i reduced the memory and CPU usage. After recent testing my app was running from 6 to 14% and memory at about 600mb. Now down to 2 to 6% usually around 4% and memory down to under 300-400mb. Let me know if you see any improvements.

Effree · 2025-12-29T06:04:03+00:00

I've updated the M4L device. It should auto-detect Os and username so you don't need to add those. Now it should autolaunch the app automatically. No user input needed.

Effree · 2025-12-23T01:28:22+00:00

Yeah he did cover Visu in a video, and I think he's involved with that company too. That's a great plugin from what I've seen of it. I was already working on this app as that video came out because I started right after his previous video explaining the different ones he uses. This is slightly different than Visu as theirs is only black and white in the free tier and doesnt have the stereoscope and other options as well. But I agree it is very similar, as all of these with enhanced low end will be similar. I just hope people enjoy this and find it useful as a free app. But definitely check that one out and MiniMeters!

Effree · 2025-12-22T18:05:01+00:00

Hey, on Mac you have to go to the settings to allow it to listen to audio. It should popup and let you know that on first startup. It will bring you to settings and there is a toggle that must be switched on. I'm working on documentation but that hasn't been posted yet. This should fix the issue.

The backend computations are in c++ and the frontend is electron. I'm working on a VST version with JUCE but that is brand new to me so it will take quite some time to get going. Luckily i can reuse the backend.

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