Comparison

Velocity Filter vs Delay Line

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

Head to head
About

Velocity Filter

This audio unit plugin enhances synthesizer patches by making them responsive to MIDI velocity. It can function as a MIDI-controlled filter or volume control, adding natural musicality to non-velocity-sensitive sounds without altering their core tone.

Highlights
  • MIDI velocity to volume/filter conversion
  • MIDI-CC and aftertouch control
  • High-shelf filter modulation
  • Preserves original patch tone
  • Batch application to patches
Features
Read full description

WHAT IS VELOCITY FILTER? Velocity Filter is the fastest way to make all your synthesizer patches respond to MIDI velocity in a natural and musical way. Just add it to your audio unit effects on the synth track and you are done! WHAT DOES IT DO? It converts non-velocity-sensitive synths sounds into velocity-sensitive ones. Velocity Filter can be configured as either a MIDI-controlled filter or a MIDI-operated volume control. In filter mode, it adds or removes high frequency energy according to the velocity of each MIDI note, so that lower velocity notes sound softer and have less high harmonic content. You can control the amount of boost or cut and the frequency range. In volume control mode, it adjusts the volume according to incoming MIDI velocity. WHAT ELSE DOES IT DO? In addition to MIDI velocity, you can also control the filter using MIDI-CC or aftertouch controls. So you can control it in a variety of ways. HOW IS THIS BETTER THAN EDITING MY SYNTH PATCHES TO MODULATE THE FILTER CUTOFF BY MIDI VELOCITY? Most synthesizers respond to velocity either by modulating the cutoff frequency of a lowpass filter or by modulating the gain. Doing velocity response that way distorts the tone of the patch in an un-musical way, especially if it uses a resonant lowpass filter. Instead of modulating the gain of a lowpass filter, Velocity Filter modulates the gain of a high-shelf filter. The sound is very different, and can be applied on top of the existing filters in the synth patch without destroying the tone of the patch. Also, if you are browsing through a collection of 1000 patches, it's much easier to apply this filter to the output than to modify each and every patch to modulate the filter cutoff with MIDI velocity. However, it's not necessarily "better"; it's just very different. Read the limitations section below for why it's not always better. WHAT LIMITATIONS DOES IT HAVE? All notes go through one filter, so if you play two notes at the same time, with different velocities, it will set the filter for the loudest of the two notes. Also, the filter takes about 1 millisecond to change from loud to soft, so if you quickly switch from loud to soft, you'll hear the filter clamping down AFTER the initial attack. This is problematic for synth patches that have near zero attack time. Velocity Filter does not support GarageBand because GarageBand does not support sending MIDI messages to audio effects. Velocity filter is an audio unit plugin ONLY. It runs inside of host apps such as AUM, Audiobus, Cubasis, Auria, and Beatmaker 3.

About

Delay Line

This audio effect app offers a high-quality digital delay with smooth parameter control for musical echoes. It's designed to add depth and space to your sound without unwanted noise.

Highlights
  • High-quality digital delay
  • Smooth parameter interpolation
  • Feedback control
  • Musical echoes
  • Linear interpolation for delay time
  • Comprehensive parameter smoothing
Features
Read full description

A high-quality digital delay effect with smooth parameter interpolation and feedback control. This delay provides clean, musical echoes perfect for adding depth and space to your audio. The delay uses linear interpolation for smooth delay time changes and includes comprehensive parameter smoothing to eliminate zipper noise during real-time parameter adjustments.

Screenshots

Velocity Filter4 screens
Delay Line4 screens

Verdict

The call

The clearest difference is ratings volume: Velocity Filter at 7 against Delay Line's 2. Velocity Filter also leads on iOS requirement (12.0 vs 17.0). Delay Line's advantage is price ($1.99 vs $2.99). On rating, 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

Velocity Filter costs $2.99 and Delay Line $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Velocity Filter against 5.0 for Delay Line. Both are backed by a comparable volume of ratings — 7 and 2 respectively.

Scorecard3 real differences · 7 level
Velocity Filter versus Delay Line: the parameters behind the verdict, then further details
ParameterVelocity FilterDelay Line
Price$2.99$1.99 — better
Rating5.0 (7 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews—
Number of ratings7 — better2
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size15 MB7 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company LimitedCallback Audio, LLC

Customer experience

Velocity Filter

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Delay Line

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Velocity Filter

No in-app purchases

None

Delay Line

No in-app purchases

Questions

Is Velocity Filter free?
Velocity Filter costs $2.99, with no in-app purchases.
Is Delay Line free?
Delay Line costs $1.99, with no in-app purchases.
Which has better reviews, Velocity Filter or Delay Line?
Velocity Filter and Delay Line are both rated 5.0 out of 5 on the App Store, from 7 and 2 ratings respectively.
Do Velocity Filter or Delay Line have ads?
Neither Velocity Filter nor Delay Line shows ads.

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