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AUTOTUNE Hardware ? | Quick review of the TC Helicon Voicetone C1 - YouTube
BOSS Vocal Performer Effects Processor Guitar Pedal (VE 500),Silver multi effects stompbox for singing guitarists| | - AliExpress
Amazon.com: FLAMMA FV03 Voice Changing Sounds Like Robot Male Female Baby Vocal Effects Pedal with Delay Reverb Effects for Polishing Up Vocals Includes Guitar Input with Optional Guitar Reverb Effects : Musical