Loopy Pro: Create music, your way.
What is Loopy Pro? — Loopy Pro is a powerful, flexible, and intuitive live looper, sampler, clip launcher and DAW for iPhone and iPad. At its core, it allows you to record and layer sounds in real-time to create complex musical arrangements. But it doesn’t stop there—Loopy Pro offers advanced tools to customize your workflow, build dynamic performance setups, and create a seamless connection between instruments, effects, and external gear.
Use it for live looping, sequencing, arranging, mixing, and much more. Whether you're a live performer, a producer, or just experimenting with sound, Loopy Pro helps you take control of your creative process.
Download on the App StoreLoopy Pro is your all-in-one musical toolkit. Try it for free today.
Hum removal
I’m struggling to remove hum from an acoustic guitar recording. I’ve looked for presets in fab filter q4 but did not see any. I’m not sure what I’m looking for on the spectrum graph to identify the hum. I’ve swept up and down the frequencies but can’t isolate the noise. Is there an app specifically for this purpose. I know I should eliminate the hum before recording but it just shows up sometimes.
Comments
I get the best results from Klevgrand’s “Brusfri”. You let it record several seconds of input and stop the analysis phase. It then applies some pretty magical “filtering” Ithey call it a series of “gates” (i.e. blocking filters) and that hum is never heard again if Brusfri is in your recording set up. Check it out in some YouTube demos:
Hum? Or buzz? The requirement is very different for each. You could try around 60Hz and 50Hz for the two most common places to look for hum.
Brusfrei is the best option by far, though you do need a bit of audio with only the hum to "train" its noise profile.
On that same line of thinking, if you want to search around using an equalizer, look at a spectrogram with just the noise, no playing if you can.
No audio of just hum. It shows up half way through recording. I’ll try the klevgard app. Thanks for help
Busfrei isn't going to do you very much good if you don't have any audio with just the hum. It creates a "noise profile" from a snippet of audio and uses that to figure out what to remove. Maybe it'll still do something, but not how it's optimized to work.
Low cut or high pass filter.
https://apps.apple.com/us/app/stray-cat-purrist/id6744827686
I use purrist to clean up guitar input. It may help here.
This is a topic that interests me. I recently dealt with AC hum from a single pickup. Would you be able to provide an audio sample here, @Jmd8928?
There is information on the forum that Brusfri adds latency, so I didn't even try it.
https://forum.loopypro.com/discussion/comment/869348/#Comment_869348
Though further down the same thread, someone also writes:
"I use Brusfri constantly and never noticed any latency. And I'm someone who can't think straight with the slightest latency"
https://forum.loopypro.com/discussion/comment/869329/#Comment_869329
There is a switch to decrease the latency in Brusfri by turning off lookahead. The noise reduction is not quite as good good without lookahead but is still pretty good.
Brusfri reports 20ms latency in AUM. Plugins don't always report their latency accurately to the host, but that's what the plugin is reporting.
(I also note that AUM reports 20ms latency for plugged in earbuds. I don't know what to make of that.)
True but then Ed responded with "Just did a simple test by recording transients direct and through Brusfri. About 3 ms (additional) latency." I changed link to this comment in my post above.
It would be interesting to compare Brusfri with Lookahead OFF with Pure Stray Purrist or Blue Mangoo Noise Gate. https://forum.loopypro.com/discussion/41785/what-is-the-best-ios-noise-gate-for-guitar
Ah ok, yes I guess many (most?) ppl would not care about or notice 3ms latency
Generally speaking, yes. But guitarists are more sensitive to it. My limit for acceptable delay (which doesn't mean I'm happy with it) is 10 ms. And that's a total of 7 ms (audio interface) + 3 ms (wireless adapter). That's why I don't use most Klevgrand or FAC AUv3 apps. I can just feel the latency in my fingers.
I just did a quick test. Lookahead added 20 ms of latency for me.
Fair enough!
Try turning off lookahead.
My bad, I didn't write that correctly. I meant to say "I didn't buy."
I'm currently using Blue Mangoo Noise Gate, and I was inspired by the "Hum template (50Hz)" preset from TBEqualizer. It's too aggressive for me, but thanks to it, I discovered that my biggest problem is at 150Hz.
That reminds me, Rob Jackson's GtrEQ has a "Buzz Kill" switch. For $1.99 it might be worth a try.
If you have TB Equalizer there is a HUM Template preset you can play around with. I use it a lot and also brusfri when mixing noisy sources.
Thanks for the shout-out @wim. Much appreciated.
On the topic of mains hum, it's not just about notching out 50 or 60Hz. You also have to attenuate certain harmonics (*), and tune it so it doesn't impact your base tone too much. That's basically what I do in GtrEQ.
(*) Which includes 150Hz if you're in the UK / Europe.
I use Brusfri to kill the single-coil hum from my Telecaster. With lookahead off I do not notice the latency whatsoever, it works perfectly.
Of course, before resorting to software solutions, always try to reduce interference in the signal path. Could be a grounding issue. If it's intermittent, see if you can reproduce it by moving your guitar around in space---the orientation with respect to various electrical emitters can make a big difference.
I completely forgotten about this app, thanks for reminding me, back on the wish list.
Great to know. cheers.
It’s the first thing I put in my guitar chain. Literally, my default guitar session in AUM has Purrist as the only plugin and I load others as needed.
As always this forum is so helpful I thank everyone for their replies and help. I’m thinking about the purrest app. The latency of the klvengrad app worries me. I need to figure out where this hum is coming from. I have furman power supply, all pedals are using mxr power brick. The 5150iii is pretty noisy I wonder if I have a failing tube. Ah as much as I love my old school guitar rig. I’m starting to think kemper or that neural dsp might be the way to go for home recording
@FizzyLizzy27 / All, sorry if this is a silly question, but if I'm running my guitar directly into my focusrite usb audio device and through some auv3 plugins (like ToneStack, which for many presets gets a bit noisy/high gain), would something like purrist have any effect or is it more for the hum coming off of mic'ed amps. I'm thinking that my not-so-high-end Tele might provide a bit of it's own hum even going straight in, but just wanted to get your thoughts and to whether you'd put purrist before or after the guitar effects...Thanks
How is the sound getting into the iPad?
There's less work for a plugin to do to get rid of hum if it's placed before anything that's going to amplify and complicate it through saturation.
If it's for recording rather than performance, there's nothing stopping you from simply using it for cleaning things up after recording, when latency isn't an issue, is there?
But again, it would be far more effective to capture some of the hum without any playing, to give Brusfri a noise profile to work with.
Doing Guitar -> Purrist -> Tonestack should definitely help with hum. I also have a not-so high-end tele knockoff (the Starcaster 💫) and it helps clean the tone up and gates nicely.