Comparison

Discord4 vs lo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Discord4

This stereo pitch-shifting delay app offers three distinct algorithms for vintage, clean, or experimental granular effects. It features tempo-synced delays, a reverb in the feedback loop, and flexible LFO modulation for extensive sound design. Control pitch shifts with MIDI and fine-tune effects with buffer size adjustments.

Highlights
  • Three pitch-shifting algorithms (Vintage, Clean, Granular)
  • Tempo-synced and free-running delays
  • Reverb in feedback loop for shimmer effects
  • Flexible LFO modulation
  • MIDI note control for pitch shifting
  • True stereo operation with panorama controls
  • Resizable vector-based GUI
Features
Read full description

Discord4 is the latest version of our most popular and long-lived product, our Discord stereo pitch shifter. Originally modeled from the H910, Discord has long since become its own effect and a studio standby, and this version includes major additions to further stretch its capabilities. This application includes a stand-alone version (with Inter-App Audio) and an AUv3 effect for use in hosts that support that format, such as Beatmaker 3, AUM, Cubasis, and Garageband. A full PDF manual is available at the Audio Damage website. Discord4 consists of three separate algorithms: a "vintage" mode (the original Discord algorithm, modeled on the Eventide H910 and H949), a "clean" mode for more modern shifting sounds, and a "granular" mode for experimental effects. Each mode has its strengths, depending on the input material, and Discord3 has a broad palette of capabilities as a result. The P1 and P2 algorithms have full control over the buffer (window) size of the shift effect, for fine tuning the shift to the input signal, or for stranger sound effects. At the extremes of the six-octave shift range, some truly strange aliasing and artifacts can be had with this control. Discord4 retains its pair of tempo-synced delays and bandpass filters from previous versions, and adds a reverb in the feedback loop (for easy access to "shimmer" effects). We have also replaced the modulation sources from the original with our all-new FLFO (Flexible LFO) design. Panorama controls are included to control the stereo width of the wet signal. Finally, soft saturation and limiting have been added or improved throughout the signal path, for an overall improved sound and added vintage-style warmth, and to allow for extreme feedback experiments without fear of overloading your DAW's channel. Features • Pitch Shifting: Discord4 contains a pair of shifters with three separate algorithms (Vintage, Clean, and Granular) for different styles of pitch shifting. • Buffer Size Control: The P1 (Vintage) and P2 (Clean) algorithms have a Buffer Size control, from 32 to 2048 samples, for fine-tuning the pitch shifting effect. • Delay: Tempo-synced or free-running delays with feedback, cross-feedback, and a sophisticated bandpass filter. • Reverb: A simple stereo reverb is added to the feedback path, for "shimmer" effects and further sound exploration. • Modulation: Two of our new FLFO (Flexible Low-Frequency Oscillator) with tempo sync and an arbitrary waveform, capable of a nearly infinite number of modulation shapes using only three controls. • True Stereo Operation: Discord4 has a true stereo signal path, with entirely independent control over each side, finishing with panorama settings for stereo width. • MIDI Note Control: Six octaves of pitch-shifting can be controlled with MIDI note input. • All-New GUI: Vector-based resizable user interface. • Presets: Cross-platform XML-based preset manager.

About

lo

This app offers a versatile toolkit for manipulating audio with a variety of lo-fi effects. Explore historical audio degradation, modern digital artifacts, and analog warmth to transform your sound.

Highlights
  • Convolution reverb with unique impulse responses
  • Spectral processing for MP3 simulation and pitch shifting
  • Digital section with bitcrusher and CD stutter
  • Analog section with tape saturation and noise generation
  • Rearrangeable processing sections
  • Dozens of presets for sound warping
Features
Read full description

"LO‑FI‑AF is a very capable lo‑fi toolkit capable of surgically targeted destruction and it could easily find applications in just about any musical genre" -SoundOnSound Unfiltered Audio's lo-fi-af is now available on iOS as a Standalone app or AUv3 plugin! lo-fi-af takes your sound on a journey of artifacts and noise throughout recorded history, from tape warbles and vinyl noise to MP3 chirps and cell phone speaker chatter. lo-fi-af's many sections and versatile algorithms can place your sound in a different decade, or give it a thoroughly modern spin through compound processing. The first section is a convolution reverb preloaded with impulse responses from broken microphones, toy speakers, cell phones, and more. With this section alone, you can place your sound into an entirely different space. The Spectral section then splits your sound into thousands of frequencies before reconstructing it with a twist. Here you can reproduce the sound of a pirated MP3 or pitch shift your signal with clean perfection. Your signal then takes a trip through the digital section. All sorts of hazards are present here, from a skipping CD stutter effect to a multimode bitcrusher. Finally, the rich, colorful analog section adds that vibe that you crave. A maximizer, a tape saturator, a noise generator, an analog-style filter, a pitch warbler, and a radio demodulator all work together in harmony to toss your sound into the past. But wait! That's only one possible signal chain. The Convolution, Spectral, Digital, and Analog sections can be completely rearranged in any order. Dozens of presets will get your started on your sound warping adventure. As an AUv3 plugin, lo-fi-af has been tested to work perfectly with Garageband, Drambo, AUM, Cubasis, Beatmaker, Nanostudio, apeMatrix, Loopy Pro, and more! Additionally, with its clear layout and smart resizing, lo-fi-af can be used on tablets and phones with ease. (Note for Drambo users: Drambo does not yet have automatic Plugin Delay Compensation for managing plugins with latency. As a result, tracks with lo-fi-af will not line up properly with other tracks. An upcoming patch for Drambo will add this feature in.)

Screenshots

Discord42 screens
lo4 screens

Verdict

The call

The clearest difference is update cadence: lo at fortnightly against Discord4's every 10 months. lo also leads on rating (5.0 vs 4.7). Discord4's advantage is price ($8.99 vs $9.99) and iOS requirement (9.3 vs 11.0). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Discord4 costs $8.99 and lo $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

lo holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 29 and 29 respectively. Written reviews point the same way: 61% of Discord4's written reviews are positive against 67% of lo's.

UpkeepUpdate frequency

Discord4 ships an update every 10 months, lo fortnightly. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

Scorecard4 real differences · 6 level
Discord4 versus lo: the parameters behind the verdict, then further details
ParameterDiscord4lo
Price$8.99 — better$9.99
Rating4.7 (29 ratings)5.0 (29 ratings) — better
Positive reviews61.1% of reviews66.7% of reviews — better
Number of ratings2929
Update frequencyEvery 10 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.3 — better11.0
Further details — not scored
Size12 MB17 MB
Age rating4+4+
DeveloperAudio Damage, Inc.Unfiltered Audio

Customer experience

Discord4

All ratings29 ratings
Positive93.1%
Neutral0.0%
Negative6.9%
Written reviews18 reviews
Positive61.1%
Neutral11.1%
Negative27.8%

lo

All ratings29 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Discord4

No in-app purchases

None

lo

No in-app purchases

Questions

Is Discord4 free?
Discord4 costs $8.99, with no in-app purchases.
Is lo free?
lo costs $9.99, with no in-app purchases.
Which has better reviews, Discord4 or lo?
lo is rated higher. Discord4 averages 4.7 out of 5 from 29 ratings, while lo averages 5.0 from 29 ratings.
Do Discord4 or lo have ads?
Neither Discord4 nor lo shows ads.
Which is updated more often, Discord4 or lo?
Discord4 ships an update every 10 months, and lo fortnightly. Most recently, Discord4 was updated on October 24, 2026 and lo on October 23, 2026.

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