Eurorack › Envelope Follower EF-1 by Wildsync Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 Envelope Follower EF-1 by Wildsync €100.00 Envelope follower, amp, gate and trigger generator.Size: 6HP Unfortunately this masterpiece is out of stock =( You can sign up here to get notified when it is back in stock Add To Cart Added! Envelope follower, amp, gate and trigger generator.Size: 6HP Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More You Might Also Like Passive 8-bit DAC by Herzlich Labs €43.00 Sold Out Dual Multi by Black Noise - Buffered Dual Multiple €42.00 Sold Out Sweet Sixteen mkII by Tesseract - Faderbank and MIDI/I2C controller €226.00 Sold Out Passive Multiconnector by Synamodec - Passive multiconnector 8 or 4/4 €29.00 Dual Multi (DIY) by Black Noise €36.00