Comparison

ERS_EchORek2 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

ERS_EchORek2

This audio plugin emulates the iconic Binson Echorec2 analog delay, offering a unique, dreamlike, and psychedelic sound. Developed with careful study of original schematics, it provides enhanced controls for musicians seeking a distinctive vintage delay effect.

Highlights
  • Authentic 70's analog delay emulation
  • Binson Echorec2 sound
  • Enhanced controls
  • Psychedelic sound quality
  • Vintage delay effect
Features
Read full description

The ERS EchORek2 analog delay plugin was originally designed and sold by Harrie Munnik and his Dutch company EmptyRoomSystems. DDMF is proud to carry on the legacy by distributing and further developing the set of ERS plugins. The “ERS EchORek2” plug-in has been developed to sound like the Binson Echorec2 delay with enhanced controls. This delay has been used on thousands of recordings worldwide. Starting from the early Pink Floyd albums, its unique sound and benign unpredictability have made it the weapon of choice of musicians who wanted to add a dreamlike, psychedelic quality to their sound. As all ERS plugins, careful study of the original schematics have led to a plugin version that leaves nothing to be desired...

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

ERS_EchORek22 screens
501 Chorus Echo1 screens

Verdict

The call

The clearest difference is rating: 501 Chorus Echo at 4.5 against ERS_EchORek2's 4.1. ERS_EchORek2's advantage is price ($9.99 vs $14.99) and iOS requirement (9.3 vs 15). On ratings volume, update cadence, 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

ERS_EchORek2 costs $9.99 and 501 Chorus Echo $14.99 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 4.1. Both are backed by a comparable volume of ratings — 7 and 8 respectively.

UpkeepUpdate frequency

ERS_EchORek2 ships an update every 26 months, 501 Chorus Echo every 17 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 7 level
ERS_EchORek2 versus 501 Chorus Echo: the parameters behind the verdict, then further details
ParameterERS_EchORek2501 Chorus Echo
Price$9.99 — better$14.99
Rating4.1 (7 ratings)4.5 (8 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings78 — better
Update frequencyEvery 26 monthsEvery 17 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.3 — better15
Further details — not scored
Size13 MB23 MB
Age rating4+4+
DeveloperChristian SiedschlagNembrini Audio

Customer experience

ERS_EchORek2

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%

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

ERS_EchORek2

No in-app purchases

None

501 Chorus Echo

No in-app purchases

Questions

Is ERS_EchORek2 free?
ERS_EchORek2 costs $9.99, with no in-app purchases.
Is 501 Chorus Echo free?
501 Chorus Echo costs $14.99, with no in-app purchases.
Which has better reviews, ERS_EchORek2 or 501 Chorus Echo?
501 Chorus Echo is rated higher. ERS_EchORek2 averages 4.1 out of 5 from 7 ratings, while 501 Chorus Echo averages 4.5 from 8 ratings.
Do ERS_EchORek2 or 501 Chorus Echo have ads?
Neither ERS_EchORek2 nor 501 Chorus Echo shows ads.
Which is updated more often, ERS_EchORek2 or 501 Chorus Echo?
ERS_EchORek2 ships an update every 26 months, and 501 Chorus Echo every 17 months. Most recently, ERS_EchORek2 was updated on October 24, 2026 and 501 Chorus Echo on October 18, 2026.

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