Waves Announce Upcoming 48 Hour Sale With $50 Voucher Too In an unusual move, Waves have announced an upcoming sale which will include discounts of up to 80% on some plug-ins. The sale will run on June 26th and 27th for 48 hours. To sweeten the deal even more, you can sign up and get a free $50 gift code that you can use in the 48 hour sale to make things even cheaper.