Hello Axel, The reason was simply because the sfplay object in Max supports up to 28 output channels only (according to the Max manual). This is still large enough to support up to the 4th HOA or the 22.2 channel 3D system. We knew that colleagues who work on WFS or a larger loudspeaker array testing would need 64+ channels, but this was not possible in the current version due to the structure that uses multichannel files instead of multiple single files.
In a future version we might be able to update it so that single audio files can be mapped to arbitrary channel outputs instead of using single multichannel file that has predefiend output channels. Cheers, Hyunkook ========================================= Dr Hyunkook Lee, BMus(Tonmeister), PhD, MAES, FHEA Senior Lecturer in Music Technology Leader of the Applied Psychoacoustics Laboratory (APL) http://www.hud.ac.uk/research/researchcentres/mtprg/projects/apl/ School of Computing and Engineering University of Huddersfield Huddersfield HD1 3DH United Kingdom Phone: +44 (0)1484 471893 Email: [email protected] Office: CE 2 /14a ________________________________________ From: Axel Ahrens [[email protected]] Sent: 10 November 2016 16:24 To: Hyunkook Lee Subject: RE: [Sursound] Universal Listening Test GUI Generator Hi Hyunkook, That looks very interesting! It could be very useful for us, however, we have a 64 channel reproduction system. What is the reason for the 28 channel limit? Thanks a lot in advance! Best, Axel -----Original Message----- From: Sursound [mailto:[email protected]] On Behalf Of Hyunkook Lee Sent: 10. november 2016 16:26 To: Surround Sound discussion group Subject: [Sursound] Universal Listening Test GUI Generator Hello everyone, I'd like to introduce you a free Max-based software named HULTI-GEN (Huddersfield Universal Listening Test Interface Generator), which we developed to assist researchers and students who conduct listening tests. It's a fully customisable GUI generator that supports up to 28-channels of wav file. It was written on MAX7, and you need to have MAX7 installed to run the software, but it runs without a MAX license. I guess some of you are already using the beta version that we released at the 138th AES convention in 2015. We now release the Version 1.0, which can be downloaded from the link below. https://www.hud.ac.uk/research/researchcentres/mtprg/projects/apl/resources/hulti-gen/ The software package zip file includes a full manual and a quick start guide for multiple comparison. Below is a brief description about the software. HULTI-GEN takes user-defined parameters (e.g. the type of scale, the number of trials and stimuli, randomisation, settings for reference and anchors, etc.) and automatically constructs a GUI suitable for the requirement of the listening test. This allows the user to quickly create various types of multiple and pair-wise comparison test environments. To assist the user, HULTI-GEN also provides a number of presets based on ITU-R recommended methods such as MUSHRA and ABC/HR. The user can also flexibly edit these presets to adjust the recommended methods for different test requirements (e.g., adding audible anchors, removing hidden reference, etc.). Subject's responses are saved as a text file, which can be easily imported into Excel for data analysis. HULTI-GEN supports the playback of multichannel wav. file of up to 28 channels, which is useful for multichannel 3D sound quality evaluations. In the future we are planning to release Ver 2 including psychometric methods such as transformed staircase (e.g. 2 up 1 down) and adaptive method of adjustment. I hope this tool becomes useful to the community. Any feedbacks and suggestions for future updates would be appreciated. Best wishes, Hyunkook ========================================= Dr Hyunkook Lee, BMus(Tonmeister), PhD, MAES, FHEA Senior Lecturer in Music Technology Leader of the Applied Psychoacoustics Laboratory (APL) http://www.hud.ac.uk/research/researchcentres/mtprg/projects/apl/ School of Computing and Engineering University of Huddersfield Huddersfield HD1 3DH United Kingdom Phone: +44 (0)1484 471893 Email: [email protected] Office: CE 2 /14a University of Huddersfield inspiring tomorrow's professionals. [http://marketing.hud.ac.uk/_HOSTED/EmailSig2014/EmailSigFooter.jpg] This transmission is confidential and may be legally privileged. If you receive it in error, please notify us immediately by e-mail and remove it from your system. If the content of this e-mail does not relate to the business of the University of Huddersfield, then we do not endorse it and will accept no liability. _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on. University of Huddersfield inspiring tomorrow's professionals. [http://marketing.hud.ac.uk/_HOSTED/EmailSig2014/EmailSigFooter.jpg] This transmission is confidential and may be legally privileged. If you receive it in error, please notify us immediately by e-mail and remove it from your system. If the content of this e-mail does not relate to the business of the University of Huddersfield, then we do not endorse it and will accept no liability. _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
