You are here

App Works

Making Music On The Move
Published December 2012
By Bill Lacey, Hugh Robjohns & Paul Nagle

Yonac Magellan

Synthesizer For iPad

Magellan is a new virtual analogue synthesizer for the iPad. It's notable for having two independent synth parts, accessible via separate on-screen keyboards or stacked into one monster layer. Each synth has three oscillators and two filters and when these spurt through the extensive effects rack, the end result isn't always subtle, but can be brutally effective. Factor in a basic audio recorder, dual arpeggiators and a polyphonic step sequencer, plus a Kaoss-style performance pad, and Magellan ticks more boxes than you ever thought existed. The downside of this is that the interface feels somewhat cramped on an iPad screen and I couldn't help thinking we're reaching the limits of how much can (or should) be included in a single app.

Magellan lets you play two patches on two keyboards at once, each with their own arpeggiator.Magellan lets you play two patches on two keyboards at once, each with their own arpeggiator.The Magellan sequencer. Note the standard keyboard has here been replaced by a touchpad complete with glowing finger tips.The Magellan sequencer. Note the standard keyboard has here been replaced by a touchpad complete with glowing finger tips.The synthesis parameters are spread across two panels. The oscillators, mixer and amp envelope are on the first; the filters, LFOs and filter envelopes are on the second. In purchasing Magellan, I was wooed by the comprehensive selection of features, including oscillator sync, FM and ring modulation as well as subtleties such as 'drift' to simulate the pitch variations of real analogue. There's a unison mode that stacks oscillators for even greater excesses, while the dual filter system offers serial or parallel operation and 11 different filters, including formant, comb and notch — not forgetting a selection of low-pass, band-pass and high-pass types.

With so much programming muscle, I expected to be more impressed by the 240+ factory sounds. Generally, these were quite disappointing and most quaff deeply from the effects cup. Even basses don't escape a drenching in reverb — a reverb whose quality I guarantee not everyone will like! However, there are worthwhile original sounds to be created if you cut the effects down, restrain the resonance and generally turn off a few bells and whistles.

For instant gratification, the polyphonic step sequencer can address both synth engines — a real bonus for lovers of complex, intertwined sequences. A finished pattern may be stored into one of 16 different locations, and you can switch between during performance or arrange them into a basic song using 'Timeline', an implementation that's just simple enough to get used!

Finally, the effects are a major component in Magellan's sound. The list includes distortion, bit-crusher, flanger, phaser, chorus, stereo delay and reverb, and all can be active at once! As you can imagine, this provides a wealth of colours to invigorate the synth's slightly underwhelming raw tones. That said, Magellan's 16-voice polyphony and layering is impressive (eight voices are available from an iPad 1) and when you introduce an external MIDI controller, the dual synth engine does start to come alive. Incidentally, although MIDI is well catered for (there are 80 MIDI-assignable controls, plus sync, etc.) the synth doesn't respond to program changes.

For my money, Magellan doesn't yet threaten synths such as Sunrizer, Addictive Synth or Animoog but it is bi-timbral and undoubtedly feature-rich. If you relish in-depth programming and effects, or if you particularly enjoy step sequencers, there's potential here waiting to be realised. Paul Nagle

Apogee MiC

Microphone For iOS

The number of direct USB-connected mics seems to be growing daily, and there are obviously many situations where the convenience and immediacy of this approach is paramount. One of the latest additions to this field is Apogee's MiC which, as with all current Apogee products, only works with Mac OS- and iOS-based devices — so if you live in an Apple-free zone you can turn the page right now! MiC is compatible with the iPad (all three versions), iPhone (4 and 4S) and iPod touch on iOS 4.3 or later, or any Mac computer with OS 10.6.4 or later, and it's designed to work with GarageBand and other audio recording apps (I mostly used iRecorder Pro).

The Apogee MiC with its supplied tripod.The Apogee MiC with its supplied tripod.Metal-bodied and pretty compact, the MiC measures just 115mm long by 37mm in diameter and weighs 195 grams. The front is styled to resemble a miniaturised studio capacitor mic, but the rear is slightly flattened giving a D-profile when viewed from above. The flat back enables the supplied miniature tripod to be attached via a threaded socket at the rear, and a ball-head allows the angle of the MiC to be adjusted. With the tripod legs opened right out to their maximum angle to ensure stability, the mic capsule ends up roughly 140mm above the table surface.

The fixed cardioid-pattern capsule appears to be a 15mm electret (ie. typical small diaphragm sized), which is protected behind a multi-layer mesh grille. Its internal 'studio-quality' mic preamp (with a thumbwheel to adjust gain over a 40dB range) is bus-powered from whatever the MiC is plugged into, and digital conversion is courtesy of a 'PureDIGITAL' 24-bit converter and USB encoder which operates at either 44.1 or 48 kHz sample rates (determined by the recording app). The quality of preamp and converter seem to be significantly better than those built-in to iOS devices and Mac sound cards. A multi-colour LED on the front of the MiC indicates power (blue), an active connection to an audio program (green), and overload (yellow/red). No drivers are required to use the MiC — it's a simple plug-and-play operation with iOS and OS X devices. Two cables are supplied in the box: a 1m cable terminating in a standard USB 2 plug for connecting to Macs, and a 0.5m cable with an iOS Dock connector for the iPad, iPhone and iPod touch. At the other end of these cables is a neat latching connector that slots into the base of the MiC. (Optional extras include three-metre versions of both of these cables, a threaded adapter to allow the MiC to be supported from a standard mic stand, and a protective carrying case.)

After plugging the MiC in, placing it in front of a source, and adjusting the gain, it's just a case of starting recording. The dim blue LED turns green when the recording app is started, and the strength of the green LED is dependent on the recording level. It's just a case of rolling the thumbwheel to get a fairly steady bright green. If it starts to flick orange or red the level is too high.

Recordings made with the MiC sound pleasantly bright, crisp and clean, with negligible electronic noise. It tends to sound a little bass-light unless you work it really close, but actually that's no bad thing for a desktop mic as it aids the clarity of spoken and singing voices, acoustic guitars and so on. I was impressed with the sound quality overall, as well as the ease of use. There is no monitoring facility built in — that has to come via the iOS device or Mac headphone socket, which means there will be some latency. I found the MiC worked with a very low buffer size quite happily in simple sessions ­­— typically 32 samples — but more complex GarageBand sessions might require longer to avoid glitching.

Apogee's MiC would make a good podcast mic, and delivers surprisingly good sound quality for recording acoustic instruments too — you could certainly make a fairly decent demo using just a MiC and an iPad, for example — provided you paid some attention to the acoustics of the recording environment. Certainly this technology isn't a weak point in the recording process! Hugh Robjohns

PPG WaveGenerator

Wavetable Synth App For iPad

Readers with any knowledge of synth lore will surely know the name Wolfgang Palm, the developer of the ground-breaking digital wavetable synthesizers in the 1980s under the PPG banner. The original PPG went through a number of iterations, ending with the Wave 2.3 in 1984 (see Gordon Reid's Waldorf PPG Wave 3.V review in SOS April 2011 and John Molloy's retro look in SOS December 1996). While it may be tempting to compare his latest creation with its vintage predecessors, the new interface is so unique and makes such excellent use of the iPad user interface that comparisons are meaningless. This is the PPG of the future, and Wolfgang Palm has set the bar for others to surpass.

PPG WaveGenerator's main screen.PPG WaveGenerator's main screen.As well as allowing you to draw your own waveforms, PPG WaveGenerator can also transform pictures or photos into wavetables.As well as allowing you to draw your own waveforms, PPG WaveGenerator can also transform pictures or photos into wavetables.The PPG WaveGenerator has just about every feature you would expect from a fully specified piece of hardware or desktop synthesizer. In summary: three oscillators, three noise generators, 24dB low-pass filter with overdrive, four LFOs, 13 envelopes, dual amplifiers, arpeggiator, delay and reverb effects, and up to 256 waveforms available per wavetable. Users can create their own waveforms by drawing and picking, as well as transforming pictures taken with the iPad camera or imported from the Photos app. There is a great in-app Help system, a Program Manager to handle patch storage, an internal recorder with the ability to record and share up to 10 minutes of stereo audio, and the ability to receive MIDI.

There are four primary pages: Wave, Para, 3D and Setup. The Wave page hosts the Wave Editor, Spectrum Editor and Wave Grid. It's here that you'll have the most fun creating and modifying waveforms and the way they connect to each other. The Wave Grid records your movements as you use your finger to pick individual harmonics or drag over a series of harmonics creating new waveforms. Connecting these in various ways creates wavetables. You may then create a linear path from any point in the grid, or individually select the waveform points to define a specific path. A 'Browse' mode lets you audition each waveform, and you can additionally modify waveforms, overdub on to the existing set and even swap the order by moving columns of waveforms. Users can also import wavetables from existing patches, or work with the supplied PPG wavetables and modify to taste.

The Para(meter) page contains a few unique features worth mentioning. Wave Offset allows you to shift the path inside the Wave Grid either horizontally or vertically to allow for subtle to dramatic changes to the character of the sound. Blending allows the waveforms to move smoothly from one to the next, or switch abruptly. The Glide parameter is unique to each oscillator, so you can create some cool polyphonic portamentos with different speeds when Legato mode is enabled. The Wave Envelope controls the speed at which the wavetable path plays. You can invert the shape of the envelope, resulting in the wavetable playing in reverse. You can also create envelope loops for more animated sustains. A unique feature is the ability to modulate the filter from the horizontal or vertical position on the key. These same controls can be applied to the wavetables themselves, the pan spread, and gain. This amounts to very expressive control from an inflexible surface. It's not unlike having aftertouch control.

The 3D page provides a visualisation of the first 128 wavetables. The fun really begins when you snap a picture or dig into your photo library for the Image Transformer to process. Here images are transformed into either waves or spectra. The results are unpredictable, but can be another source of interesting waveforms. Finally, the Setup page allows you to set the maximum number of voices (up to 20) as well as external MIDI settings. Version 1.0.2 introduces a Virtual MIDI In port, allowing the app to run in the background and be controlled by another app that supports Virtual MIDI Out. This opens up some interesting possibilities: I created some truly massive sounds controlling the PPG from Moog's Animoog and mixing the two together.

PPG WaveGenerator may be an app, but it is as powerful as any VI you'll have on your desktop. This implementation of wavetable synthesis is as fresh and exciting as the day its predecessor was introduced. Bill Lacey


Published December 2012