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Decent reverb with low DSP %

wired2moonwired2moon
in General App Discussion

There’s a dizzing number of reverb apps out there - I’m keen to hear about ones that are the most resource efficient e.g. can be used on an older device without spanking the cpu. Yet quality of the effect is important too, not interested in mediocre. Any suggestions?

Comments

  • uncledaveuncledave

    AudioReverb combines impulse response for early reflections with algorithmic for long-term. It uses about 10% DSP in an AUM send channel on my iPad 6. Huge number of presets included.

  • sharifkerbagesharifkerbage

    AudioKit Reverb is really efficient, but it doesn´t have too many parameters to tweak.
    Also, SparkVerb by UVI is quite efficient considering the amount of customization you get.
    Bleass Reverb is another good option.

  • wired2moonwired2moon

    @uncledave I have AudioReverb and very fond of it, it’s about 10% on my 2017 iPad but looking for more like 5%. On complex projects I’d rather not send all instruments to the same 1 or 2 reverb instances hence the question

    @sharifkerbage thanks for those - if you’re able to provide any kind of relative measure of dsp % it’d be super useful

  • AlfredAlfred

    Eos2

  • uncledaveuncledave
    edited December 2022

    If you already use one of the multi-FX packages (NuRackFX, iFX Rack, BYOD, Vintage Rack, MixBox), you could try an algorithmic reverb from one of them. Note that Fantasy Verb in iFX rack is actually a collection of impulse responses, so it's not light on DSP.

    Alternatively, a simple delay may be what you need for tracks not suited to the common reverb send channel.

    Edit: Both EOS 2 and mVerb in iFX Rack use about half the DSP of AudioReverb on my iPad 6. I used the Node Statistics in AUM to measure these in a busy ZOA session.

  • AlfredAlfred

    In eos2 there is some valhalla reverb.

  • AlfredAlfred

    AU3FX:Space is light

  • [Deleted User][Deleted User]
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  • MFBTMFBT
    edited December 2022

    Cpu metering is only accurate once you know all of the cpu cores are engaged. You need to max out the cpu, then walk it back an app or two so you know everything is firing, then add your app to test.

    Different patches have different cpu use also. If we're looking at a synth, polyphony and voices matter (is it on, how much is used when testing).

    That said, based on my testing a la above AU3FX SPACE by kymatica is 3ish points on ipad pro 2017, WU REVERB by Jens Guell is less than 1 point. Both are capable of very transparent reverbs, with the kymatica app having more crazy possibilities. Both have more tweaking available than the excellent Rack Reverb that was mentioned.

  • espiegel123espiegel123

    @uncledave said:
    AudioReverb combines impulse response for early reflections with algorithmic for long-term. It uses about 10% DSP in an AUM send channel on my iPad 6. Huge number of presets included.

    The “CPU % “ readouts are unreliable indicators of CPU use and relative use particularly when the cpu is unstressed .

    Comparing what the meter says with one instance loaded does necessarily give an accurate picture of the CPU use of one AU compared to another. You would compare the number of instances needed to bring the system to its knees. When you do that you sometimes find something very different from what you see when comparing when only one instance is loaded.

  • uncledaveuncledave
    edited December 2022

    @espiegel123 said:

    @uncledave said:
    AudioReverb combines impulse response for early reflections with algorithmic for long-term. It uses about 10% DSP in an AUM send channel on my iPad 6. Huge number of presets included.

    The “CPU % “ readouts are unreliable indicators of CPU use and relative use particularly when the cpu is unstressed .

    Comparing what the meter says with one instance loaded does necessarily give an accurate picture of the CPU use of one AU compared to another. You would compare the number of instances needed to bring the system to its knees. When you do that you sometimes find something very different from what you see when comparing when only one instance is loaded.

    Thank you for this advice. I loaded up my session (4 instruments driven by ZOA) with several instances of Alien Box, which reliably uses 20% DSP per instance. This drives iPad 6 into the beginning of crackling, with DSP MAX displayed. Under these conditions, I swapped in different reverb AUv3s, and reviewed their DSP use as displayed in AUM. They used a Large Hall preset when available. The results are as follows:

    • AUFX:Space 2.4-3.2%
    • IFX Rack mVerb 2.5-3.7%
    • EOS 2 2.8-4.3%
    • Zero Reverb 3.2-4.2%
    • NA Analog Rack Reverb 3.4-4.8%
    • AudioReverb 4.1-6.2%
    • NuRack Reverb 4.5-5.3%
    • RF-1 4.5-5.4%
    • Rack Reverb 5.0-6.7%
    • Vintage Rack 5.3-6.2%
    • BYOD Smooth Reverb 9.0-11.3% (2x oversampling)
    • iFX Rack FantasyVerb 9.2-12.0%

    The conclusion is roughly as before. The lightest algorithmic models use about half the DSP of AudioReverb. Most others take more.

    Edit: Added NA Analog Rack Reverb.

    Also, while exercising this, I noticed that when a module is swiped left in AUM, it is actually removed from computation ("true bypass"). This differs from simply muting a channel, which just silences the output, without affecting the computing load.

  • MFBTMFBT

    @uncledave said:

    @espiegel123 said:

    @uncledave said:
    AudioReverb combines impulse response for early reflections with algorithmic for long-term. It uses about 10% DSP in an AUM send channel on my iPad 6. Huge number of presets included.

    The “CPU % “ readouts are unreliable indicators of CPU use and relative use particularly when the cpu is unstressed .

    Comparing what the meter says with one instance loaded does necessarily give an accurate picture of the CPU use of one AU compared to another. You would compare the number of instances needed to bring the system to its knees. When you do that you sometimes find something very different from what you see when comparing when only one instance is loaded.

    Thank you for this advice. I loaded up my session (4 instruments driven by ZOA) with several instances of Alien Box, which reliably uses 20% DSP per instance. This drives iPad 6 into the beginning of crackling, with DSP MAX displayed. Under these conditions, I swapped in different reverb AUv3s, and reviewed their DSP use as displayed in AUM. They used a Large Hall preset when available. The results are as follows:

    • AUFX:Space 2.4-3.2%
    • IFX Rack mVerb 2.5-3.7%
    • EOS 2 2.8-4.3%
    • Zero Reverb 3.2-4.2%
    • AudioReverb 4.1-6.2%
    • NuRack Reverb 4.5-5.3%
    • RF-1 4.5-5.4%
    • Rack Reverb 5.0-6.7%
    • Vintage Rack 5.3-6.2%
    • BYOD Smooth Reverb 9.0-11.3% (2x oversampling)
    • iFX Rack FantasyVerb 9.2-12.0%

    The conclusion is roughly as before. The lightest algorithmic models use about half the DSP of AudioReverb. Most others take more.

    How do you like the vintagerack reverb vs all the others you tested?

  • wired2moonwired2moon
    edited December 2022

    @uncledave said:

    @espiegel123 said:

    @uncledave said:
    AudioReverb combines impulse response for early reflections with algorithmic for long-term. It uses about 10% DSP in an AUM send channel on my iPad 6. Huge number of presets included.

    The “CPU % “ readouts are unreliable indicators of CPU use and relative use particularly when the cpu is unstressed .

    Comparing what the meter says with one instance loaded does necessarily give an accurate picture of the CPU use of one AU compared to another. You would compare the number of instances needed to bring the system to its knees. When you do that you sometimes find something very different from what you see when comparing when only one instance is loaded.

    Thank you for this advice. I loaded up my session (4 instruments driven by ZOA) with several instances of Alien Box, which reliably uses 20% DSP per instance. This drives iPad 6 into the beginning of crackling, with DSP MAX displayed. Under these conditions, I swapped in different reverb AUv3s, and reviewed their DSP use as displayed in AUM. They used a Large Hall preset when available. The results are as follows:

    • AUFX:Space 2.4-3.2%
    • IFX Rack mVerb 2.5-3.7%
    • EOS 2 2.8-4.3%
    • Zero Reverb 3.2-4.2%
    • AudioReverb 4.1-6.2%
    • NuRack Reverb 4.5-5.3%
    • RF-1 4.5-5.4%
    • Rack Reverb 5.0-6.7%
    • Vintage Rack 5.3-6.2%
    • BYOD Smooth Reverb 9.0-11.3% (2x oversampling)
    • iFX Rack FantasyVerb 9.2-12.0%

    The conclusion is roughly as before. The lightest algorithmic models use about half the DSP of AudioReverb. Most others take more.

    You legend, thanks so much for doing this - very revealing B)

    @Alfred said:
    AU3FX:Space is light

    Yep, a statement backed up nicely by @uncledave ’s testing. Should’ve realised as I have AU3fx:dub. I reckon this is a dev who strikes as good a balance as anyone between power, quality and efficiency. Kudos.

  • sharifkerbagesharifkerbage
    edited December 2022

    The Nembrini Reverb is also worth to mention
    https://apps.apple.com/se/app/analog-rack-reverb/id1497464859?l=en

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