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However Sound Performance Laboratory (SPL) reserves the right to modify the product described in this manual at any time. Changes without notice. This document is the property of SPL and may not be copied or reproduced in any manner, in part or full without the authorization of SPL. Limitations of Liability: In no event will SPL be liable for any damages, including loss of data, lost profits, cost of cover or other special, incidental, consequential or indirect damages arising from the use of the unit, however caused and on any theory of liability. This limitation will apply even if SPL or an authorized dealer has been advised of the possibility of such damage. SPL electronics GmbH P.O. Box 12 27 D- 41368 Niederkruechten, Germany Phone: +49 - 21 63 / 9 83 40 Fax: +49 - 21 63 / 98 34 20 eMail: info@spl-electronics.com © 1999 SPL electronics GmbH. All Rights Reserved. Foreword 3 Thanks 3 Introduction 4 Operation Safety 5 Connections 6 Installing Updates 6 Quick Start 7 Analogue Tape Recording Signal Flow 7 Control Elements 8 ACTIVE 8 INPUT GAIN 8 DRIVE 8 HF-ADJUST 9 OUTPUT GAIN 10 HIGH TAPE SPEED 10 LC-DISPLAY 10 LED CHAINS 10 PRESETS 11 INFO (HARDWARE DIALOGUE) 11 Specifications 15 Warranty 16 Contents Dear customer, Thank you for the confidence you have shown towards SPL electronics GmbH by purchasing the SPL MACHINE HEAD. You have decided to use a tool of high performance which sets you in the position to have faster success and a better sound quality in your music productions, pre-masterings and masterings. As a typical SPL unit the MACHINE HEAD combines exemplary specifications and high manufacturing standard with excellent sound quality to provide you a precious component for studio and mastering purposes. Please read this manual carefully to ensure you have all the information you need to use the MACHINE HEAD. We wish you every success with the MACHINE HEAD. Your SOUND PERFORMANCE LAB-Team I would like to start with my thanks to all our staff, who created what is to be described here. Special thanks go to Kai Lukas from Lukas & Hartmann Soundart, Jorg Houpert and Klaus-Peter Webersinke from Spectral Design as well as Harald Obenland from Octum electronics. The importance of their exceptional qualification and talents cannot be overestimated. Our products are often tested and compared in many publications and by our customers themselfs and constantly valued with best results. I would like to pass on this broad appreciation to those, who deserve it – my excellent colleagues. Hermann Gier Foreword Thanks © SPL electronics GmbH, Stand 10/97 Machine Head Introduction Creating authentic tape saturation effects. The sound becomes warmer and more powerful, eliminating the harshness of digital recordings. Precise reproduction of: -tape saturation effect -hysteresis effect -harmonic characteristic -linear and non linear transmission characteristic Modified reproduction of: -level behaviour -high frequency damping Not reproduced are: -cross-talk -pre or post echos -noise floor -motor speed fluctuation Easy and intuitive operation The MACHINE HEAD is a creative sound and dynamics processor within SPL.s Digital-Red series. Concept: The algorithm used by MACHINE HEAD computes authentic tape saturation effects, hitherto unavailable in the digital domain. The subjective sonic effects are an increase in loudness and a better penetration of the mix at identical peak level. The sound becomes warmer and more powerful, and the process eliminates the harshness usually associated with digital recordings. MACHINE HEAD is designed for mastering applications. Mixes gain more power, punch and warmth. It is also suited to process single instruments, like electronic or acoustic guitars and basses, drums, loops and samples, as well as complete stereo mixes. The algorithm used by MACHINE HEAD precisely reproduces the analogue tape saturation effect, including hysteresis effects, the harmonic characteristic and both linear and non-lineare transmission- characteristic (other than level) that occur when recording to analogue tape. The level behaviour and high frequency damping is reproduced in a modified manner. To achieve the best possible signal to noise ratio, an auto gain cell has been implemented into the algorithm in order to create a processing range for saturation effects for full scale input signals and to deliver full scale output signals afterwords. The intensity of high frequency damping varies from one tape to another, and is therefore fully adjustable one the MACHINE HEAD. It is now also possible to make use of extreme saturation effects without high frequency damping at all. In fact MACHINE HEAd provides all the benefits of analogue recording without any of the shortfalls – MACHINE HEAD does not reproduce cross-talk, pre or post echoes, noise floor (field noise, modulation noise) and motor speed fluctuation characteristics of analogue tape machines! Operation: MACHINE HEAD is operated with four co...