iLoop iLOOP

undercover scientist software



What is a Loop?

Navigating the display

Creating a new Loop

Recording and Playback

Using the Metronome

Changing the Volume and Balance

Sharing Loops in Emails

Editing Tracks


What is a Loop?

iLoop makes short, real-audio sound loops. These are commonly used in music programs such as Garageband to build a whole musical composition.

Each Loop in iLoop is a combination of audio Tracks, overlaid on top of each other. iLoop allows you to record and edit Tracks, and choose any number of Tracks in any combination to make your Loops.

When you record a sound it is stored as a Track in uncompressed CD quality. Each new Track is numbered to save time and allow you to record new Tracks quickly. The audio in the Tracks is never modified so you will never accidentally lose your precious audio (unless you choose to delete the Track). iLoop then allows you to combine as many of your Tracks as you like to make a multi-track Loop.

Loop files hold no audio - they simply store a record of which Tracks belong to them, and how those Tracks should be played in the current Loop. A Loop stores the volume, balance, position, and edits of every Track so that it can play Tracks in exactly the way you choose without modifying the audio of the Track. This means that other Loops can use the same Tracks and play them in different ways, allowing you to make variations of Loops quickly and easily, and also minimising the memory needed on your device.

To add a Track to a Loop, make sure the current Track has a tick (check) mark next to its name. To remove it from the Loop, touch the mark and turn it into an 'x' mark. You can load the different Tracks on your device using the bottom arrow buttons. You can load the different Loops by using the top arrow buttons. To share your Loop as an audio file, touch the email button.

Once you understand how Tracks and Loops work, you will be able to create an unlimited number of sound loops!


Navigating the Display

iLoop has all of its major controls and displays on one screen to give a flexible and powerful interface. There are two control panels - the top one for manipulating the current Loop, and the bottom one for manipulating the current Track. Loops are made by adding Tracks - to add a Track to a Loop, select the tick (check) or cross to the left of the Track name.

The Loop display shows all the Tracks overlaid in the current Loop except the current Track. Change the Loop volume to hear the current Track on its own (the Loop volume should be set to maximum to hear the Loop as it will be emailed).

The Track display shows the current Track. To hear it you must select the tick (check) mark to the left of the Track name. You can edit the Track by dragging it, moving its end points or by selecting one of the Track Settings.


Use the arrow buttons to load the next or previous Tracks, or the next or previous Loops. Use the plus and minus buttons to delete or create Tracks and Loops. Deleting a Loop will not delete any audio because Tracks are stored separately. Deleting a Track will affect all Loops that use that Track.

You can also press the Metronome button to activate the metronome, change the Loop beats per minute (bpm) or time signature. (Touch the small dots at the bottom of the window to move between panels.)



Creating a new Loop

When iLoop first starts, and when you touch the upper plus button, you will be prompted to create a new Loop. Also when you start, a fresh new Track is created. This enables you to begin a new Loop quickly should you want to begin recording as soon as possible.

The default length of a new Loop is 8 seconds. You can change the length to be as short as 3 seconds or as long as 15 seconds. The length of the Loop determines the duration of audio that will be recorded, and the maximum duration of existing Tracks. You can add a longer Track to a shorter Loop, but you will only hear the first part. You can add shorter Tracks to longer Loops without limits. Note that Tracks recorded for longer Loops will be large files and so will be slower to load and manipulate. iLoop currently supports up to 1024 Loops and 1024 Tracks on one device.

On first running, if the first three Tracks do not exist (Track0, Track1 and Track2) then you will be asked if you wish to install the demo Tracks. If you choose yes then three example tracks will be provided to get you started. You may edit or delete them like any normal Track you record yourself. If you delete them and wish to reinstall them, just delete the first three Tracks and restart the app.


Recording and Playback

To record a new Track, touch the lower plus button to create a new Track, then press the red record button in the middle. Recording will continue, looping and overwriting itself until you stop the recording by touching the record button a second time. During recording you may activate or stop the metronome. When recording is completed, the Track volume is automatically set to adjust for low or high sounds in the recording.

To play back audo, touch the play button. This will play all Tracks in the current Loop simultaneously, including the current Track (if it is in the current Loop). While playback continues the metronome may be activated, the volume and balance controls can be altered and various Track Settings may be used.

Touch the rewind button at any time to rewind the audio to the beginning.


Using the Metronome

During recording or playback you may activate or stop the metronome. Metronome clicks are not recorded, however if you do not use headphones or your volume is too high, the microphone may pick up the clicks and record them. iLoop works best with headphones set at normal volume levels.

You can press the Metronome button at any time to activate the metronome, change the Loop beats per minute (bpm) or time signature. (Touch the small dots at the bottom of the window to move between panels.) The timing of the loop will be updated above the Loop display to match your selection. You will only hear the clicks when iLoop is recording or playing audio.


Changing Volume and Balance

The volume and balance controls are easiest to move by touching, moving your finger to the right, and then moving up and down, so that you can see the levels. Changing the Loop volume allows you to isolate the current Track and hear it on its own. Normally the Loop volume should be at maximum - its value has no effect on the exported caf file attached to emails.

Changing the Track volume and Track balance enables you to edit the sound of this Track in the current Loop. The volume and balance levels do not change the Track audio file, the levels are stored in the current Loop, enabling each Loop to use the same Tracks in different ways.


Sharing Loops in emails

Touch the email button to share your Loop as a CAF file. All Tracks including the current Track (if it is part of the current Loop) are merged and exported as a file attachment to your email. To hear your Loop as it will be exported, set the Loop volume to maximum and touch the play button.

You can drag the CAF file directly into Garageband and continue to edit the audio or just use it immediately to create your composition. To load and play the file in other applications, rename the extension as . AIF


Editing Tracks

Track timing and duration can be altered by dragging the display. Note that Track audio is not changed by this process - only the current Loop stores your alterations to this Track. Other Loops may use the same Track, with alternative timings and durations.

You can alter the starting time of the current Track by simply dragging it left or right in the Track display window.

To remove the beginning of a Track, touch the left mark of the grey track duration bar and drag it to the right.

To remove the end of a Track, touch the rightmost mark on the grey track duration bar and drag it left. To extend the end of the Track and make it loop from the beginning, drag the rightmost end to the right.


You have now learned the basics of iLoop. To find out about the more advanced settings available to you, touch the Settings button at the top of this page.