$Page Convolution Reverb Convolution_Reverb.png *Welcome to Convolution Reverb* The *Convolution Reverb* device offers high-quality convolution using Impulses taken from real spaces or analog/digital hardware. Drop an impulse (or a single channel of a true stereo impulse stored as two stereo files ending with L and R) to load it in the convolution engine. Offline control is offered over the decay time and size of the virtual space. The predelay time, width of the reverb, and levels can be controlled in real time. ConvolutionReverb.png *Tip:* The Convolution Reverb and the Convolution Reverb Pro are semi-interchangeable. All shared parameters will be transferred if you drag-and-drop one onto the other from the browser to replace it. *Warning:* Parameters from the Pro version that are not supported in the normal version will be lost! $Comment -------------------------------------------------------------------------------- $Page Convolution Pro $TargetName Convolution Pro ConvolutionReverbPro.png *Convolution Pro* The *Convolution Reverb Pro* device adds further controls to those offered by the Convolution Reverb Device using a switchable tab view. Added features include: Realtime EQ, virtual positioning, modulation, frequency-dependent damping, and shape controls (impulse response trimming, reversal, and direct sound handling.) ConvProExtras.png Additionally, the Early and Late parts of the reverb may be taken from different Impulse Responses (by placing the device in Split Mode.) ConvProSplit.png This allows for a richer and more flexible control over the virtual space. IR selection from the factory set of IRs can be done using the Type and IR menus, although IRs (or even Audio Clips) may also be dropped onto the waveform space which adds the sample's parent folder as a temporary location in the Type menu. When you use the "Collect and Save" entry in Live's file menu, the used samples will also be saved with your project. *Tip:* The Convolution Reverb and the Convolution Reverb Pro are semi-interchangeable. All shared parameters will be transferred if you drag-and-drop one onto the other from the browser to replace it. *Warning:* Parameters from the Pro version that are not supported in the Normal version will be lost! $Comment -------------------------------------------------------------------------------- $Page IR Measurement Device $TargetName IR Measurement Device IRMD.png *IR Measurement Device* This lesson will show you how to use the *IR Measurement Device* to create your own Impulse Responses (IRs) for use in convolution engines such as the Convolution Reverb and Convolution Reverb Pro. Divider.tif Live's documents are known as Live Sets. This lesson is accompanied by a Live Set which you'll be interacting with as you follow the lesson. Whenever you're ready, please $Link load the Live Set . Divider.tif *Warning:* In order measure a source, one must create a *feedback loop* which we have done in this Set. Feedback loops can be dangerous to your speakers and your ears! Please do not use headphones and be cautious with volume. In this particular lesson, it's best to stick to the instructions. Once you've loaded the Set, click the *Next Page* button to start the lesson. $Comment -------------------------------------------------------------------------------- $Page IR Measurement Device Overview $TargetName IR Measurement Device Overview In this Set, we will be creating a simple IR of Live's *Reverb* effect. Return Track A contains the IR Measurement Device and Return Track B contains the Reverb we will sample. (Once you understand how the measurement process works, you can replace the Reverb with any plugin you want to measure.) The Measurement Device will send a signal out to the Reverb and the Reverb will send an affected signal back to the Measurement Device for recording and measuring. Notice how Return Track A ("A Measure") is sending to Return Track B ("B Source") and B is sending back to A. This is our feedback loop. The feedback is stopped because the measurement device is not passing its input signal out right now. (That happens when "Audition" and "Input" are enabled in the IR Measurement Device.) Double click the track title bar for "A Measure" and look at the IR Measurement Device starting with the controls on the left. The left side of the device controls the signal sent out to measure the source. *Chan* sets number of channels we want to record. If the source has the same output regardless of the panorama of the input (like our built-in Reverb), we will use "Mono to Stereo," which will send a mono signal and record a stereo IR. If the signal has a separate stereo response for each channel of input then we need to record two stereo files. This is called True Stereo. *Amp* is the amplitude (volume) of the signal. You generally want to make this as loud as you can without clipping, but it's better to be 5-10 dB below clipping than to clip your signal, since the tool can normalize a quieter result but clipping will ruin your IR. *Sweep* controls the quality of the measurement when using a sweep. *IR Time* sets the time we want to record for each stereo measurement. It's better to overestimate here than to underestimate, since underestimating will cut your IR short. The controls on the right are for listening and saving; that's explained later in the lesson. To hear the effect we'll be capturing, briefly toggle the "Tone" switch. You should hear a reverberated sine wave. The sine signal is coming from the Measurement device. The reverberation is coming from the Reverb on Send B. $Comment -------------------------------------------------------------------------------- $Page Making Your First IR $TargetName Making Your First IR To make a basic IR in this set, simply press the "Impulse" button and wait a few seconds. To listen to the result, let’s first disable the feedback loop by turning off the send amounts on each send. Now toggle the "Audition" switch on. To hear a click convolved with our recording, press the “Left”, “Center” and “Right” buttons. Each lets you hear what sounds coming from those panoramas will sound like using the IR. To hear what some real material sounds like using our new IR, let's turn off Track B so the only send we hear is Send A with the Measurement Device. Toggle the "Input" switch on to allow the signal sent to the device to be used as the Audition signal. Now add a sample to the “Send to Test” Track and hit play. You should hear the sample going through a Reverb. That's the sound of the convolution using our new measurement! Let's compare it to the original source on Send B by toggling the Solo on on Send B. Now to compare it to our recording, toggle the Solo on on Send A. Send A should sound like Send B. Turn off "Input" and "Audition" so there isn’t an accidental feedback loop later on. Save your IR to use in a convolution device by clicking the save button and choosing a name and location. Divider.tif $Comment -------------------------------------------------------------------------------- $Page Credits $TargetName Credits *Credits:* Hiss.png Powered by the $Link HISSTools Impulse Response Toolbox v1.0 From $Link CeReNeM at the University of Huddersfield Programmed by Alex Harker Product Design: Matt Jackson *Convolution IRs generously provided by:* Acousticas $Link Audio Communications Group, TU Berlin $Link CeReNeM, University of Huddersfield $Link Christian Kleine $Link Echochamber $Link Jez Wells, MRC, University of York Matt Jackson $Link OpenAir $Link Studio Tools IR Dach, IR Hallraum and IR Deserted Bathroom with kind permission by Philip Albus Divider.tif More Packs available here: $Link www.ableton.com/packs $Comment Status: Translate