Multitask effortlessly on your PC or Mac as you try out Rockrelay Synth FM, a Music & Audio app by ROCKRELAY on BlueStacks.
Rockrelay Synth FM is a straight-up FM synth that feels like a little DX7 living on the screen. It runs a full 6-operator engine, so those classic glassy bells, punchy basses, and electric piano sounds are right there, and it takes original DX7 sysex files, which means a huge world of patches to load and tweak. The layout is not flashy, but it is clear, and having an 8-octave on-screen keyboard is surprisingly handy for testing chords and ranges without menu hopping. There is reverb and delay built in, plus proper MIDI support over USB and Bluetooth, so a hardware controller can take over if that is the plan. Notes trigger fast with no obvious lag, and if stuck notes pop up when hitting big chords, switching off the phone’s three-finger gesture usually fixes it.
On PC with BlueStacks, the interface scales nicely and the on-screen keys feel responsive with mouse or touch. Programming operators on a bigger display helps a lot, because FM gets deep and small sliders can be a pain on a phone. The app lets everything be tested first, even the advanced bits, by watching a rewarded video, which is fair if someone wants to make sure their MIDI setup behaves. The one-time unlock removes ads and opens the whole thing permanently, but the app is very clear about this: if a device or controller is acting weird, better to not buy. It is a focused, nerdy instrument, not a sample pack, and that is the charm.
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