New Audio Spacial Array IC

Discussion in 'General Electronics Chat' started by pilko, Nov 16, 2011.

  1. pilko

    Thread Starter Active Member

    Dec 8, 2008
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  2. jimkeith

    Active Member

    Oct 26, 2011
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    [​IMG]Got the same notification from National yesterday, but didn't think it interested me at the time--thanks for flagging this one.

    This came to mind: I purchased this Panasonic boom box for my daughter some 24 years ago--it is still kicking around, so I took a photo. It has an "Ambience" sound feature that can be turned on and off--when we picked it out, it sounded substantially better than all others on the display shelf.

    Could this be an analog implementation of "Spacial" audio?
    If so, how does it work?
     
  3. SgtWookie

    Expert

    Jul 17, 2007
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    Try viewing their video on how it works:
    http://www.national.com/en/videos/spatial_audio_technology_overview.html
    It's pretty interesting.

    Seems to me that it used to be called "width" control.
    Rod Elliot of Elliot Sound Products posted a couple of stereo width controller circuits on his website:
    http://sound.westhost.com/project21.htm

    It also gives an explanation of how it works. So, you might be better off to view Rod Elliot's page first, and then view National's video to see what the hype is.
     
    Last edited: Nov 16, 2011
  4. jimkeith

    Active Member

    Oct 26, 2011
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    @SgtWookie, You are describing channel separation--I think it is more than that...
     
  5. SgtWookie

    Expert

    Jul 17, 2007
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    Actually, I think that this introduction is partially due to the expiration of the patent on the Hughes SRS (Sound Retrieval System), now SRS Labs.

    http://www.srslabs.com/

    http://en.wikipedia.org/wiki/Sound_Retrieval_System

    I had forgotten about SRS; it took a bit of memory jogging. I was working at Hughes when it first came out.

    TI/National's IC seems to be somewhat of an extension of SRS, in that you can interface multiple IC's across multiple speakers.
     
    jimkeith likes this.
  6. Audioguru

    New Member

    Dec 20, 2007
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    For many years, only phase change was used to enhance stereo separation. Now Texas Instruments (formerly National Semi) adds time delay and level control.
    EDIT: Windows Media Player has SRS.
     
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