In my tests, Auto Chord Recognition was largely accurate, even on songs with lots of chord changes, but it seemed to be thrown by extended chords and busy bass lines.įor example, while the Spark app had no trouble deciphering the sophisticated chords in Glen Campbell’s recording of Jimmy Webb’s “Wichita Lineman,” it simplified some of them, rendering major 7 chords as standard major triads, and frequently suggested passing chords that the song’s main guitar wasn’t playing. However, as automated chord detection is still in its infancy, I wasn’t expecting perfection. The app works seamlessly, with no time lag whatsoever. More than just a practice amp, Spark offers a two-in/two-out recording interface and comes with PreSonus Studio One Prime recording software. When you select a track to play, the app will either begin streaming the song and displaying chord blocks or, for songs it’s unfamiliar with, ask you to wait 15 seconds or so while it begins transcribing. Spark’s Auto Chord Recognition feature is also accessed through the app, which connects with platforms like YouTube, Spotify and Apple Music to analyze and display chords for songs in real time. The options are seemingly endless, and the BIAS tone engine delivers them in stunning realism. The app is also your key to the Positive Grid ToneCloud, an ever-growing library of more than 10,000 amp-and-effects presets created by professional and famous guitarists, session players, studio engineers and producers. The app comes preloaded with 30 additional presets styled after famous amps you know and love, and you can dial them in as you wish, add effects and more. Connect to the app for iOS and Android, however, and things kick into high gear. The individual mod (chorus), delay and reverb controls make it easy to dial in effects, too. The models all sound great, with the glassy setting delivering the softer, warmer and compressed tone you’d expect from a tube amp. Spark has five types of modeled guitar amp - clean, glassy, crunch, hi-gain and metal - as well as one bass and one acoustic amp model onboard. Spark has 40 watts of full-range sound from two custom-designed four-inch speakers, with a tuned bass-reflex port that allows it to produce deep and full bass as well as pure, crystalline highs.Īs an amp, it’s dead simple to use: Simply plug in, choose your amp type and dial in your preferred tone and effects. In Tuner mode it becomes a tuner, with the four LED switches indicating pitch.įinally, around back are a Bluetooth status indicator, 1/8-inch aux input for an analog device, USB port for connecting to a computer for recording and firmware updates, and the DC input for the supplied 19-volt adaptor.ĭon’t be fooled by its size. In Play mode, the tap button sets the tempo for the delay effect, and the preset buttons let you save and recall your favorite settings.
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