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- Newsgroups: comp.sys.sgi
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!mips!mips!decwrl!sgi!fido!zola!zuni!karsh
- From: karsh@sgi.com (Bruce Karsh)
- Subject: Re: Audio Questions
- Message-ID: <npaunm8@zuni.esd.sgi.com>
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc.
- References: <1992Jul25.163827.22304@news.iastate.edu>
- Distribution: na
- Date: Sun, 26 Jul 92 11:49:03 GMT
- Lines: 26
-
- In article <1992Jul25.163827.22304@news.iastate.edu> bryan@pi.eai.iastate.edu (Bryan Manske) writes:
-
- >1. How do you set the default audio gain level in hardware on
- > a 35 or indigo? (nvram parameter?)
-
- You can adjust the "volume" nvram parameter to adjust the volume of the
- boot tune. Right now, we don't provide a mechanism for setting the
- initial volume after booting. You can adjust the volume using the
- audio control panel.
-
- >2. Exactly how do the gain slots (0-255) map to real world db values?
- > (linear relationship?)
-
- On the output side, the amplitude in volts is linearly proportional to the
- output gain value. On the input side, the amplitude in dB's is linearly
- proportional to the input gain value.
-
- >And, I guess, a question from me. I'm assuming 8-bit samples.
- >Is this correct?
-
- Now way! Everything is at least 16 bits per sample per channel.
- 8 bit audio sounds terrible.
- --
-
- Bruce Karsh
- karsh@sgi.com
-