© COPYRIGHT 2015 BY ARTIM GMBH BIAS IS A PRODUCT BASED ON RESEARCH PROJECTS DONE AT THE INSTITUTE OF MUSICAL ACOUSTICS

AT THE UNIVERSITY OF MUSIC AND PERFORMING ARTS VIENNA

NEW!

DIAGNOSIS AND THERAPY TOOLSFOR BRASS AND WOODWIND INSTRUMENTS

● Because Microsoft introduced substantial changes to its operating systems Windows 7 and Windows 8.

In some cases backwards compatibility was broken for security reasons. The application programming interface was redesigned and the access to certain subsystems like audio hardware has been limited. Therefore, appli-cation programs like BIAS will not work in exactly the same way as before.

● Because we got various valuable sugge-stions and feature requests from customers like instrument makers or research depart-ments of museums and Universities.

Considering your requests we significantly improved the functionality of BIAS, VIAS and the Optimizer when we developed the new BIAS 7 product release. With BIAS 7 you will get a software package with many important new features and technical capabilities.

Why a new BIAS Software?

● Simultaneously we payed a lot of attention to avoid non-intuitive changes in the user inter-face. You will find all the commands exactly where you expect them. BIAS 7 can be used in the

same way as BIAS 6 - there is no need to relearn.

BIAS 7 works with Microsoft WINDOWS XP, WINDOWS Vista, WINDOWS 7 und WINDOWS 8.

Do I need a new measurement head for BIAS 7?

No. Our personalized software is calibrated to the acoustical and electrical properties of your measurement head. Therefore the BIAS 7 software works with your measurement head

in the same way as the BIAS 6 software.

Do I have to upgrade to BIAS 7?

No. Although BIAS 6 will not be supported anymore, you can continue working with BIAS 6 and Windows XP as operating sytem on your computer. We will continue to provide the latest release

of your personalized BIAS 6 version for download from our server www.artim.at

What to do if I want to upgrade?

Let us know your request by email (widholm@artim.at) or phone (+43 676 72 15 130). We send you an invoice and as soon as the amount arrives at our bank account your personalized version of BIAS 7 is available for download from our server at www.artim.at. BIAS 7 installs itself into a separated folder. You can use both, the BIAS 6 and the BIAS 7 software simultaneously for some time and uninstall the old BIAS 6 software at a later date. There are two options for Upgrading:

● Simple Upgrade: BIAS 7 installation file for download and handbook as PDF-file (400,-€)

● Upgrade with individual support: BIAS 7 installation file for download or installation of the BIAS software onto your computer by us. Printed version of the handbook. 1 full day individual training session in Vienna, according to your choice of subjects or 8 hours (divisible) individual support via TeamViewer. (800,-€).

All BIAS Editions

● Transient Response. Opens a plot window showing the transient phenomenon (note onset) for any selected frequency until a standing wave is established and the stea-dy state is reached. Allows to study the effect of intonation and dynamic level on responsiveness and sound of an instru-ment. The frequency range where it is ea-sily possible to lip up or down the note can be fathomed.

● Export of the transient response data as a "wave-file". With this function the sound of an instrument can be made audible for different frequencies and dynamic levels. This allows to compare the timbre of different instru-ments, leadpipes, mouthpieces and so on.

● RMS - Level. Shows the energy of the standing wave when stimulated by a pulse train of certain fundamental frequency and constant amplitude. The RMS level also contains the contributions of higher par-tials which are stimulated and supported by corresponding air column resonances.Plotting the RMS-Level over frequency reveals the totality of all playable notes, even those which do not find a support for their fundamental frequency (e.g. the pedal note).

● Export of complete "Instrument Groups" (e.g. all trumpets, or all trumpets in Bb, or instruments sharing other specific proper-ties) with only few mouse clicks only. Such export data sets can be easily imported into another BIAS database.

● Export and Import in BIAS 7 format provides readability by common text editors, databa-se software and programs like Excel.

● Export and Import of playlists and fingerings.

● Free selectable cursor- and background colour.

● Phase display of impedance data.

● Impedance measurement up to 6 kHz.

What is new in ?● Automatic composition of resonance curves

of whole instruments from separate measure-ments of its disjointed parts. For example, as it might be difficult to attach the BIAS measure-ment head to the embouchure hole of a flute, it is much easier to separately measure the head joint and the flute body, both from their plane separation end. In order to determine the intonation of the whole instrument the BIAS 7 software can combine the two par-tial measurements even taking length diffe-rences due to bore overlap into account. This operation needs only one mouse click.

● Removal of the acoustic influence of any adapter by calculation. Such an adapter might have been used for coupling the measurement head and an instrument in question for various reasons. In order to get the input impedance of the instrument at the far end of the adapter this post pro-cessing step can be applied. It converts the measured impedance curve of adapter plus instrument into one of the instrument alone, if the bore profile of the adapter is known.

Extended Edition and higher

A completely revised simulation module en-sures more realistic results related to practice.

● 1D-Simulation using spherical wave-fronts with spherical radiation into the 3D-environment according to Hélie.

● 2D-Simulation (multimodal simulation) takes into account the influence of non-uniform wave fronts. Provides more ac-curate results in cases of shape discon-tinuities and abrupt changes of the tube diameter at the expense of significantly higher computational load.

● Simulation takes user defined air tempe-rature and temperature profiles into ac-count.

● Simulation takes user defined loss fac-tors (e.g. due to non-standard inner sur-face roughness) and loss profiles into account.

● 2D-Simulation (multimodal simulation) takes into accout the influence of non-uniform wave fronts. Provides more accurate results in cases of shape discontinuities and abrupt changes of the tube diameter at the expense of significantly higher computational load.

● Simulation takes user defined air tempera-ture and temperature profiles into account.

● Simulation takes user defined loss factors (e.g. due to non-standard inner surface roughness) and loss profiles into account.

● Influence of wall vibrations and lip forces according to newest research results pu-blished in the Journal of the Acoust.Soc.America.

New in VIAS

● Direct write access to the BIAS database for making VIAS measurements or simula-tions accessible to the BIAS software for comparison, analysis or archivation.

● Direct read access from the BIAS databa-se for importing BIAS measurements for sophisticated post processing in VIAS.

● Export of time domain pulse response data from frequency domain impedance curves.

● Simulation of bore lists with an external termination impedance (e.g. from a previ-ous measurement).

● Calculation of the transfer function, radia-tion impedance, sound pressure spectrum at the end of the bell, and mechanical re-sonances.

● Calculation of reflectance and energy effi-ciency from measured or theoretical impe-dance or transfer function data.

● Complex arithmetic for measurement data (sum, difference, product, quotient, reci-procal value, square, root, absolute value, imaginary part, real part, conjugates).

● Derivative and integral of measured or cal-culated frequency domain spectra (Dis-placement <-> Velocity <-> Acceleration).

● Influence of wall vibration and lip forces according to newest research results pu-blished in the Journal of the Acoust.Soc.America.

Professional Edition"Optimiser"

● New direct interface between Optimiser and BIAS database.

● Termination of an arrangement by measured impedance data read from a VIAS-file. This allows e.g. the optimisation of a lead pipe without recalculating the rest of the instru-ment with its radiation properties during each calculation step. Such a procedu-re saves most of the computing time and achieves a better matching between model and measurement.

● Optimisation and and reconstruction of bore profile, temperature profile and loss factor profiles revealing surface conditions.

● Optimisation of global processing parame-ters for instrument parts like stretching, shrinking or scaling (discontinuous, linear, elliptical, Gaussian, Kaiser window or expo-nential scaling)

● Optimisation of design parameters of in-strument parts e.g. flare angle of conical sections, hyperbolic exponent of bell pro-file, shape parameter of Bessel horn, sha-pe parameter of exponential horn.

● Optimisation of global material properties.

● Optimisation of wall thickness profile and rim wire diameter at the end of the bell.

● Optimisation of clamps (mass, damping, stiffness) and support elements like braces.

● Matching of transfer function, radiation im-pedance, sound pressure spectrum at the end of the bell, and mechanical resonances respectively their impact on the impedance.

● 1D-Simulation using spherical wavefronts with spherical radiation into the 3D-environ-ment according to Hélie.

● Main value, minimum and maximum of groups of measurement data.

● Resampling and smoothing of Curves.

● Interpolation of data for a given frequency grid.

● Time domain measurements with a pulse hammer: Single-hand control (auto-ac-cept good data for subsequent averaging)

● 2D-Simulation (multimodal simulation, according to the PhD thesis of J. Kemp and A.Braden) takes into accout the in-fluence of non-uniform wave fronts. Pro-vides more accurate results in cases of shape discontinuities and abrupt changes of the tube diameter at the expense of si-gnificantly higher computational load.

● 1D-Simulation using spherical wavefronts with spherical radiation into the 3D-envi-ronment according to Hélie.

● Influence of wall vibrations and lip forces according to newest research results pu-blished in the Journal of the Acoust.Soc.America.

● Simulation takes user defined air tempe-rature and temperature profiles into ac-count.

● Simulation takes user defined loss factors (e.g. due to non-standard inner surface roughness) and loss profiles into account.

● Influence of external clamping (mass, damping, stiffness) and support elements like braces on the playability of single notes.

If questions arise don't hesitate to contact me!

email: widholm@mdw.ac.atmobile phone: +43 6767215130