Re: [Sursound] Array for sound field recording and extend the sound image
Thanks very much. You are so kind. I will have a try as your suggestion. Best regards, Rilin Chen Do let us know with what results ! These type of problems are usually a learning experience for us all Best of luck, Michael ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] Array for sound field recording and extend the sound image
You can make a velocity microphone by subtracting two closely spaced omnis. I saw a paper on making ambisonic recordings like this a couple of years ago: http://www.aes.org/e-lib/browse.cfm?elib=15389 The problems, though, are spatial aliasing at high frequencies and lack of sensitivity at low frequencies. These would both need addressing in a practical system. Best wishes Tim Dr. Tim Collins Electronic, Electrical and Computer Engineering University of Birmingham Edgbaston, Birmingham, B15 2TT, UK www.eee.bham.ac.uk/collinst -Original Message- From: Mike Felton [mailto:mjfel...@gmail.com] Sent: 08 January 2013 00:21 To: Surround Sound discussion group Subject: Re: [Sursound] Array for sound field recording and extend the sound image The mics are omnis It might be stating the obvious here but how would you get ANY directional information out of four OMNI mics close together? :-) Surely to get a fig-8 response you need two CARDIODS back to back (one of which is polarity reversed obviously). Mike Felton ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
[Sursound] DTS Headphone:X
FYI... http://www.businesswire.com/portal/site/home/permalink/?ndmViewId=news_viewnewsLang=ennewsId=20130107005822div=102718548 2013 International CES LAS VEGAS--(BUSINESS WIRE http://www.businesswire.com/)--DTS, Inc. http://cts.businesswire.com/ct/CT?id=smartlinkurl=http%3A%2F%2Fwww.dts.com%2Fesheet=50522721lan=en-USanchor=DTS%2C+Inc.index=1md5=54a19b052c2fa2a7cb7a301507a868e4 (Nasdaq: DTSI), a leader in high-definition audio solutions and audio enhancement technologies, today announced DTS Headphone:X™, the company’s most advanced headphone technology to date, capable of recreating the home theater surround sound experience using only a pair of headphones. etc. Home Theater in your Pocket (HTiP) with surround sound for headphones (up to 11.1 channels) 11.1 should be Auro-3D. Best, Stefan ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] DTS Headphone:X
http://www.businesswire.com/news/home/20130108005830/en/DTS-Announces-Complete-Generation-Audio-Solution-Ultra “The DTS UHD solution will deliver beyond 3D sound over as many speakers as the listener would like, but UHD audio is about more than just a bunch of speakers,” said Fred Kitson, chief technology officer and executive vice president at DTS. “It’s about immersive sound over headphones. It’s about expanded features that provide enhanced value to content owners and distributors. It’s about offering the consumer greater choice and flexibility in their listening environments as well as a newfound level of engagement with their sound experience.” To accelerate next generation content creation, DTS intends to provide the industry with Multi-Dimensional Audio (MDA™) as an open object-authoring format as the industry looks to avoid a format war for next-gen content creation and cinema delivery. Of course this is marketing speech, but they present something. Best, Stefan Schreiber Stefan Schreiber wrote: FYI... http://www.businesswire.com/portal/site/home/permalink/?ndmViewId=news_viewnewsLang=ennewsId=20130107005822div=102718548 2013 International CES LAS VEGAS--(BUSINESS WIRE http://www.businesswire.com/)--DTS, Inc. http://cts.businesswire.com/ct/CT?id=smartlinkurl=http%3A%2F%2Fwww.dts.com%2Fesheet=50522721lan=en-USanchor=DTS%2C+Inc.index=1md5=54a19b052c2fa2a7cb7a301507a868e4 (Nasdaq: DTSI), a leader in high-definition audio solutions and audio enhancement technologies, today announced DTS Headphone:X™, the company’s most advanced headphone technology to date, capable of recreating the home theater surround sound experience using only a pair of headphones. etc. Home Theater in your Pocket (HTiP) with surround sound for headphones (up to 11.1 channels) 11.1 should be Auro-3D. Best, Stefan ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] Array for sound field recording and extend the sound image
At 11:54 08-01-13, Tim Collins wrote: You can make a velocity microphone by subtracting two closely spaced omnis. I seem to recall that Blumlein did this and also found that the s-n ratio was poor. David ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] Array for sound field recording and extend the sound image
Without more details, it hard to speculate about problems, but I'll note that subtracting the outputs of two omnis to get a fig-8 response will result in a frequency response that rises 6dB/octave with a 90 degree phase shift relative to the sum. Unless that is corrected, these signals are not suitable for B-format. I have checked my encoder, and definitely right as you said. I have just compensated for the magnitude and lost the phase modification. After modified, the location of audio is right and the sound image have been extended and much natural. But if the location of the sound is on the front of array, the listener cannot perceive clearly ・ whether the audio is in the front or on the back. I think it needs more processing, e.g. add ・ head tracking. If I have I have good result, I will share it with all. But it need more time since ・ I am not familiar with it：） ・ ・ Thanx very much for help from all of you. 华为技术有限公司 Huawei Technologies Co., Ltd. [Company_logo] Phone: Fax: Mobile: Email: 地址：深圳市龙岗区坂田华为基地 邮编：518129 Huawei Technologies Co., Ltd. Bantian, Longgang District,Shenzhen 518129, P.R.China http://www.huawei.com 本邮件及其附件含有华为公司的保密信息，仅限于发送给上面地址中列出的个人或群组。禁 止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、或散发）本邮件中 的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本邮件！ This e-mail and its attachments contain confidential information from HUAWEI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it! -- next part -- An HTML attachment was scrubbed... URL: https://mail.music.vt.edu/mailman/private/sursound/attachments/20130109/4a9de64c/attachment.html -- next part -- A non-text attachment was scrubbed... Name: image001.jpg Type: image/jpeg Size: 6737 bytes Desc: image001.jpg URL: https://mail.music.vt.edu/mailman/private/sursound/attachments/20130109/4a9de64c/attachment.jpg ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
