Brass Instrument Analyzing System (BIAS)

The hardware and software system for evaluation of brass instruments quality.

BIAS consists of the digital signal processor board to plug into a free slot of the PC, an external sub-system which contains the analog-digital and digital-analog converters, filters and amplifiers, and the measuring head for trumpets, horns, trombones, and tubas. An additional microphone allows sound analysis of instrument tones blown by the musician.

BIAS is a powerful tool for:

Brass Instrument makers

Development of new instruments Production Control ISO 9000 Instrument Improvement Quality Control and Certificates for instruments of master series

Tuning and Trade Companies

• Individual Adjustments to the player
• Mouthpiece of Intonation and Responsiveness
• Quality Certificates for master instruments
• Sales Support

Acoustic Research Departments

• Input Impedance Measurement of complete instruments or parts of an instrument or tubes
• Pulse Reaction and Transfer function
• Disturbance Analysis
• Evaluation of Intonation Error
• Evaluation of Responsiveness
• Sound Analysis of played notes by the musician

BIAS works under Windows and is easy to use!

You need not to be able to play the instrument yourself and you don't need a musician to evaluate the quality of the instrument. BIAS does this for you. No knowledge about physics, mathematics, computer and music is necessary! A mouse-click on the icon and BIAS provides you with exact and reproducible results!

INTONATION Evaluation of one instrument or up to 8 different instruments. Graphic display of notes sounding or written. Fingerings: all or only standardized fingerings. Different weights for "piano", "mezzoforte", "fortissimo" and individual selectable weights are only some features of this powerful module.

IMPEDANCE "Acoustical fingerprint" of the instrument. Up to 8 curves can be loaded and displayed. (All valve combinations of one instrument or up to 8 different instruments). With the cursor you can determine all values of frequency and amplitude. Zoomfunction and scrolling available.

DISTURBANCE DIAGNOSIS Determine the "acoustical length" of the instrument or of different parts (e.g. slides). Locates precise areas of disturbances inside the instrument.

RESPONSIVENESS This feature calculates and "over all value" ("R-factor") of the instrument and gives detailed information on the responsiveness of each playable note for different fingerings.

SOUND ANALYSIS Each note played by a musician can be analyzed displayed on screen and stored for comparison or further processing.

FEATURES:

• IMPEDANCE
• INTONATION EVALUATION
• DISTURBANCE DIAGNOSIS
• PULSE RESPONSE
• RESPONSIVENESS
• SOUND ANALYSIS
• ZOOM FUNCTION
• DATABASE
• STATISTICS
• MUSICAL CALCULATOR

Jet Systems Sofia, Bulgaria phone: +359-2-975-3750