I'm currently recording backing tracks for a local school production of 'Les Miserables'. The lead in to the Innkeeper's Song requires a long slide on the trombone of D->A and lasting several seconds. This slide is completely exposed and I'm having trouble making it sound realistic. A sound like a police siren would be my crude description of the sound I currently have!
The one or two semitone slides in other places sound fine using the pitch bend wheel. I was wondering whether you think this large interval is beyond the limits of what I could reasonably achieve with GPO? If you think I could do it, then any pearls of wisdom would be much appreciated.