Vince Clarke (Human Ligue) and Martyn Ware (Depeche mode & Erasure) work separately in their own home studios using largely virtual instruments on Apple Macintosh computers running Logic Audio Pro - although, unusually, Vince often develops ideas first on acoustic guitar. Martyn describes their working process as 'like a first unit and second unit' in filmmaking - Vince supplying the material, Martyn finessing the results. A Vincent Clarke is credited with 'programming' on 'Pretentious' and 'Spectrum Pursuit Vehicle', a Martyn Ware with production and mixing - although nowadays, Martyn is the expert at more abstract 3D soundscape composition, which he composes and records with the help of his right hand man and sound engineer, Asa Bennett.