Comparison

Attack Softener vs 501 Chorus Echo

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

Head to head
About

Attack Softener

This audio effect plugin removes the initial attack transient of notes, allowing for synth-like sounds from various instruments. It functions like a transient shaper but can silence pick sounds for fast music, enabling clean solo tones without distortion.

Highlights
  • Removes note attack transients
  • Creates synth-like instrument sounds
  • Functions like a transient shaper
  • Silences pick sounds for fast music
  • Enables clean solo tones without distortion
  • Preserves original instrument tone
Features
Read full description

Attack Softener is an effect that fades the beginning of each note you play to remove the attack transient. This allows you to make synth-like sounds with almost any instrument (guitar, bass, piano, etc.) HOW DOES IT WORK? It functions similarly to a transient shaper. Unlike a transient shaper though, it can bring the volume of attack sounds down to near zero quickly enough to silence the pick sound of an electric guitar in very fast music. WHAT IS IT USED FOR? It works with any instrument but we really like to use it with electric guitar. We recommend the following effect chain: Guitar -> Attack Softener -> Compressor -> Reverb. The combination of the attack softener and compressor is especially nice because the compressor keeps the volume balanced when playing clean solos but heavy compression intensifies the pick click noise, making it inappropriate for many styles of music. With the Attack Softener placed before the compressor you can get a nice, even clean solo tone that doesn't have punchy hard pick sounds. This allows you to play solos with a clean tone, where normally you would have to use distortion or overdrive to get sustain, now you can get that distorted "light touch" feel without the harshness of distortion. MORE TECHNICAL EXPLANATION OF HOW IT WORKS A transient shaper creates two volume envelopes. One rises immediately and falls slowly; the other rises slowly and falls slowly. The difference between these two envelopes indicates how far the volume should be reduced to silence the attack. However, changing the volume very quickly usually causes noise in the sound because of volume changes that happen naturally during the sustain part of the notes. This plugin is different from ordinary transient shapers because it combines several new methods to help it differentiate between real attack transients and other volume changes, and it uses dynamic filters that adjust the response time to ensure that it can respond quickly without introducing audible clicking sounds when the volume changes. IS THERE ANY OTHER EFFECT LIKE THIS OR IS IT SOMETHING NEW? EHX makes a pedal called Attack / Decay that does something similar. There are several other pedals that also do swell effects. All of them are designed for long fades and slow playing except the EHX one, which can operate faster by separating each new note onto its own audio channel using spectral processing. That spectral note separation distorts the tone signficiantly. This Attack Softener plugin is the only effect we are aware of that handles fast picking while preserving the original tone of the instrument.

About

501 Chorus Echo

This audio plugin meticulously models the iconic Roland RE-501 Chorus Echo, offering authentic analog warmth with modern digital flexibility. It provides producers with classic tape delay, BBD chorus, and spring reverb sounds, enhanced by DAW tempo sync and expanded controls for any music genre.

Highlights
  • Authentic analog sound reproduction
  • Extended creative control with DAW sync
  • Intuitive user interface
  • Versatile for any music genre
  • Independent SOS timings
  • Linear preamp option
Features
Read full description

"Legendary Analog Warmth: Authentic Spring Reverb, Classic Tape Delay, and Lush BBD Chorus in a Cutting-Edge Plugin" Rediscover the iconic sound of the Roland RE-501 Chorus Echo*, now reborn as the NA 501 Chorus Echo plugin by Nembrini Audio. This meticulously modeled plugin captures the essence of the legendary tape echo, BBD chorus, and spring reverb, enhanced with modern digital functionality for today's music producers. Ideal for adding rich, analog textures to any genre, the NA 501 is a versatile tool for musicians and producers seeking that classic sound with contemporary flexibility. Key Features:: 1 - Authentic Sound Reproduction: Delivers the classic warmth and character of the Roland RE-501 through precise digital modeling. 2 - Extended Creative Control: Offers advanced features like DAW tempo sync, expanded chorus and delay parameters, and independent SOS timings. 3 - Intuitive User Interface: Designed for ease of use, blending vintage aesthetics with modern digital efficiency. 4 - Versatility for Any Genre: Whether you're producing rock, electronic, ambient, or beyond, the NA 501 fits seamlessly into any musical project. Equipped with features tailored for modern production, the NA 501 includes DAW tempo synchronization, a wide parameter range for the BBD chorus and analog tape delay, separate left and right SOS timings, and a linear preamp option. These technical enhancements ensure that the NA 501 not only emulates the classic sound but elevates it to new levels. Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect Legal Disclaimer: RE-501 Chorus Echo is a registered trademark of Roland Inc. NA 501 Chorus Echo was developed by Nembrini Audio SRL based on its modeling techniques. Roland has not endorsed nor sponsored the NA 501 Chorus Echo in any manner, nor licensed any intellectual property for use in this product.

Screenshots

Attack Softener4 screens
501 Chorus Echo1 screens

Verdict

The call

The clearest difference is review sentiment: Attack Softener at 50% against 501 Chorus Echo's 0%. Attack Softener also leads on update cadence (every 3 weeks vs every 17 months) and price ($5.99 vs $8.99). 501 Chorus Echo's advantage is rating (4.5 vs 4.3). On ratings volume, ads, in-app purchases and monetization model 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

Attack Softener costs $5.99 and 501 Chorus Echo $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

501 Chorus Echo holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 10 and 8 respectively. Written reviews complicate that: 50% of Attack Softener's written reviews are positive against 0% of 501 Chorus Echo's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Attack Softener ships an update every 3 weeks, 501 Chorus Echo every 17 months. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

Scorecard5 real differences · 5 level
Attack Softener versus 501 Chorus Echo: the parameters behind the verdict, then further details
ParameterAttack Softener501 Chorus Echo
Price$5.99 — better$8.99
Rating4.3 (10 ratings)4.5 (8 ratings) — better
Positive reviews50.0% of reviews — better0.0% of reviews
Number of ratings10 — better8
Update frequencyEvery 3 weeks — betterEvery 17 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15
Further details — not scored
Size13 MB23 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company LimitedNembrini Audio

Customer experience

Attack Softener

All ratings10 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

501 Chorus Echo

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Attack Softener

No in-app purchases

None

501 Chorus Echo

No in-app purchases

Questions

Is Attack Softener free?
Attack Softener costs $5.99, with no in-app purchases.
Is 501 Chorus Echo free?
501 Chorus Echo costs $8.99, with no in-app purchases.
Which has better reviews, Attack Softener or 501 Chorus Echo?
501 Chorus Echo is rated higher. Attack Softener averages 4.3 out of 5 from 10 ratings, while 501 Chorus Echo averages 4.5 from 8 ratings.
Do Attack Softener or 501 Chorus Echo have ads?
Neither Attack Softener nor 501 Chorus Echo shows ads.
Which is updated more often, Attack Softener or 501 Chorus Echo?
Attack Softener ships an update every 3 weeks, and 501 Chorus Echo every 17 months. Most recently, Attack Softener was updated on September 30, 2026 and 501 Chorus Echo on October 1, 2026.

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