http://www.stevesmusiccenter.com/BacklineFXTracker.html
"The Backline FX-Tracker uses a set of sophisticated algorithms to provide a variety of effects that can adjust to your playing speed or your playing volume."
* Up to 70 effects and up to 100 preset locations
* Effect timing and effect depth can react to your playing speed and playing volume
* Six main effects categories including delay, chorus, tremolo, flanger, filter and pitch shifter
* An additional delay effect can be placed before, after or in parallel with any of the six main effect types
* Delay time that can track your playing. Shorter delay with faster playing or longer delays with faster playing
* Your playing speed can change the modulation speed of chorus, tremolo, flanger, filter or pitch shifter
* Your playing speed or your playing volume can change the delay feedback level or the depth of the chorus, tremolo, flanger or filter effects
* Transition between a delay effect and any other effect by changing your playing speed or playing volume
* There are several automatic whammy and dive bomb effects available
* Programmable arpeggiator patterns can provide unique harmony effects
* Several envelope effects for volume, chorus, flanger, filter or pitch shifter
* You can time the second delay effect to the chorus, tremolo, flanger or pitch shifter modulation speed
* You can use two types of delays at once and time them to each other or your playing
* Several different stereo effects including delay, chorus, tremolo and flanger
* Up to 60 seconds of stereo delay time including looping functions
* Full MIDI implementation. Control any parameter with an external MIDI controller or use MIDI messages to select from the 100 presets
* Synchronize a MIDI drum machine to your playing speed
* Output your playing speed or playing volume as MIDI CC messages to an external device such as an amp modeler.
* Use and external MIDI expression pedal to manually modulate chorus, flanger, and filter or create a whammy pedal.
* You can download firmware updates to protect your investment
http://www.stevesmusiccenter.com/BacklineRiffBox.html
"Welcome to the world of intelligent looping. If you are frustrated with traditional loopers that require you to hit a footswitch at just the right time in order to get the correct loop timing, you have come to the right place. RiffBox™ uses a patent applied for algorithm that creates perfectly timed loops every time."
* The length of the recording can be timed to your playing instead of a footswitch press.
* The start and stop of loop recording can be timed to your playing, timed to an external audio source or timed to MIDI start and stop commands.
* You can sync an external drum machine to your playing during loop playback.
* Unique delay effects can be achieved that are timed to your playing.
* 76 different looping modes including automatic layering and automatic fading.
* Store up to 100 configurations as presets.
* 16-bit stereo or 16-bit mono recording modes, both with 48KHz sampling rates.
* Up to 40 seconds of recording time in stereo or 80 seconds in mono at 48KHz.
* Full MIDI implementation including program change messages, continuous controller messages, start and stop commands and sysex data dumps.
* Recording and playback can be controlled using MIDI program change messages, an external footswitch or a built-in footswitch.
* Swap mode allows a mono loop to play back out of left channel while you play along through the right channel.
* A mono input can be sent to both the left and right channel outputs.
* Half speed playback mode for learning complex recorded passages.
* Reverse mode for unique playback effects.
* Toggle between normal, reverse and half speed mode during playback.
* Change the loop length during playback.
* Multiply modes that allow you to automatically increase your loop length.
* Doubling mode that adds a fuller sounding loop playback.
* Trigger a MIDI drum machine with your playing.
* You can download firmware updates to protect your investment.