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While there might not be an amp sim on iOS that sounds convincing, some of the modeling amps are awfully impressive. My Boss Katana sounds better than the tube amps I played through for years. Granted, my tube amps weren't top of the line, but the Katana sounds better. So, I don't think what is lacking in iOS amp sims (which are still quite useful) is due to inherent defects in digital technology.
I will say that the Katana through its speaker sounds much better than using its direct out.
For me, I’m talking about how you get cool feedback, sympathetic resonance, and a wide range of expression when using real electric guitar or bass setups. Especially when you incorporate high volume and distortion.
Honestly, I haven’t tried any modern modeled amp hardware. I would be surprised if they gave the same ‘real-time analog’ feel I am attempting to describe.
They do. They interact with the guitar, speaker and room just like analog amps. There are quite a few modeling amps out there that are great and responsive. The Katana got onto my radar because a friend who has been a lifelong Mesa Boogie aficionado recommended it. It has become his rehearsal amp of choice and he even uses it on quite a few gigs.
Things have come a long way since the first modeling amps.
I'll add that I was super skeptical when he raved about the Katana but have no regrets. Amazing especially considering that it runs about $200
I suspected that could be the case. Faster processing and advancement in algorithms can get impressively realistic results in other digital realms, namely graphics and animation. And Tonestack sounds and feels great to me, actually. I used a Pod before the iPad, and the iPad was a definite improvement for me.
Now I am wondering if Bias is significantly better than Tonestack. Guess I will looking into that app a little more.
I don't find Bias obviously better than ToneStack. I have both and find that both have their merits. For certain things, I find that Bias is a bit fatiguing to my ears in the high-mids with high gain sounds in a way that ToneStack isn't for me. But there are punchy clean sounds that I find easier to get with Bias than in ToneStack. But , I haven't spent as much time as I should exploring all of the models available in ToneStack.
Awesome. Thank you for the info.
Since the discussion already went into the Sim vs Real discussion, I wanted to ask you fellas if someone managed to simulate or generate amp feedback within IOS
Yes. If you get your guitar near the speakers with gain up high it will absolutely feedback just like a normal guitar amp
You can get real feedback (as @Panthemusicalgoat says) (but don't generate feedback with headphones on -- it can do serious damage to your ears), but I don't know of any feedback simulation effects.
Not in iOS (I wish!), but Digitech's FreqOut pedal does a mighty fine job and is hours of entertainment for feedback experimentation without getting the cops called on you!
i thought tonestack had an emulation of the boss distortion feedbacker (df-2)? maybe Bias, or IK multimedia has it?
though it doesn't 'feel' the same, a tuned resonator can sound like feedback. also, a short delay with lots of feedback ( a resonator essentially - difficult to tune though).
Try playing through your iPhone speaker, then put your iPhone speaker on or near your pickup. I would think that would do it.
Plus you may be able to control the feedback easier, like using a weird, feedback e-bow.
Then, let me know how it works.

The thing about feedback is that is a system that involves, the instrument, the signal path, the speaker/speaker cabinet, the room, and the physical relationship between these. It's character changes a lot as you play and move.
While one can get actual feedback going with your mobile device, it might not be very satisfying (or it might , depending on what you are after). Playing through my studio monitors, for example, I can get feedback but I often don't find it's sound to my liking--compared to the various guitar amp/speaker combos at my disposal.
Yeah, I predict feedback, but most likely thin sounding compared to high volume, big speaker feedback.
This idea is actually a variation on using a handheld cassette recorder on the pickup to get a primitive sample-like playback through your guitar-FX pedals-amp signal chain.
Used to do this back in the early 90s, when samplers were fascinatingly expensive, and I didn’t even have my first PC yet.
On a sort of off topic but guitar related, what guitar app does anyone push through their amp and effect sims?
I tried GeoShred but turning off the internal effects can be tedious. Also I feel it’s thin sounding with just the string simulation.
Also tried Gutarism but it keeps crashing, and iFretless. The sampling does some weirdness.
On the other hand S t r n g does well
Umm if you use an interface out to a regular pa speaker it'll feedback just like a normal amp. Maybe I'm not understanding the question I assumed you meant feedback when your amp tone vibrates the guitar strings and then comes out the amp again. Like the start of most punk songs.
Just stand next to the PA it's really simple. Works thru any amp sim as long as you don't have a noise canceling pedal on
Also the issue with amp sims seems twofold.
1) pushing air. Using headphones or tiny speakers is never going to feel right. It's not moving any air. Solvable. Run your sim thru a giant set of speakers. You can actually feel it
2) latency. Its not a huge deal but I definitely notice. Theres a little bit of latency (even at the lowest kinda buggy 64 frame buffer) that unfortunately isn't solvable at this time
the EBow can produce feedback sounds, but only on one string at a time. no guitar cab required. pushing the EBow down, onto the string, sounds like guitar feedback.
the sustainiac (pedal) affects multiple strings and sounds like stereotypical feedback (because it is).
the gizmotron 'can' sound like multiple string feedback. recently reissued as well.
feedback sounds fine through studio monitors to my ears, but it's different (better?) through a tube amp.
@audiblevideo said:
i like S t r n g as well.
yonac steel guitar (not just a pedal steel) is quite good.
Awesome feedback guys
Tweak geoshred a lot (save it as a base preset of yours and create others from there) and feed to tonestack + bias
Edit: Oh... forgot to mention that I really dig Caustic 3's KSSynth. Gonna try to work something out using Caustic Modular with KS and PCM Synth (layered)
Yeah I have two or three “naked presets” but I’m still unsatisfied. The GeoShred presets themselves are very well designed and sound great. Mine not so much esp without effects
@senhorlampada Karplus Strong you say.... hmmmm. I wonder if that’s the synthesis method s t r n g uses.
If i'm not wrong, they're the same
s t r n g uses karplus-strong. tuned delay with feedback. essentially a resonator.
karplus-strong uses a noise burst to ring/trigger the sound. If we use a resonator, or a short delay with feedback, we can use a source of our choosing to ring/trigger. Instead of a noise burst, a guitar note/chord. Sympathetic resonance. Post process the resonator with some overdrive/distortion, fuzz, waveshaper, etc. and it can sound like guitar/amp feedback. Parallel process? Distortion/ fuzz before the resonator for additional harmonics? Distortion before and after resonator? Compression to emulate the compression of a speaker cone? expansion? Etc.
...
Won’t get my money if it’s not AUv3. I’m happy enough with Tonestack 2 and the Motherload.
[edit] Facepalm.
Huh? ToneStack 3 is the current version and that's a video from 2016
Sorry. It’s really early here and I got excited 🙈🙈🙈 that not good journalism
Sorry for then confusion fellas!
I will grab a cappuccino for sure. Maybe that will work for you too
False alarm...