Obsolete Room Guides

These outdated room guides are retained for historical purposes. 


[This obsolete documentation was moved to the archive in February 2022]


Archived documentation

Studio C is our intermedia lab.

See our long form user guide on the wiki: https://ccrma.stanford.edu/wiki/CCRMA_IPL_Studio_C_User_Guide

Some Quick Start pdf's are also available below


[This obsolete documentation was moved to the archive in February 2022]

Current documentation:

Archived documentation

Studio's D and E are primarily designed for composition, mixing and mastering in a multi-channel sound field and are identical to each other with several important differences.  They are also used occassionally for simple recording tasks and various research experiments, and are located in the Knoll Room 221 and 320 (behind the Classroom and Stage) respectively.

As with any of the Studio's please don't unplug or repatch any of the studio equipment.  Also refrain from eating and drinking in the studios.  Reserve the rooms with the CCRMA Room Booking System

See the attached pdf files below for current studio operations and Quick Start Guides!

Monitor Level Calibration

The monitoring level is calibrated. With a standard signal and standard routing and levels you should get about the same SPL readings on all studios. For details on how and why to do this see this very good article:


Settings used for calibration as follows:
  • pink noise output level in Digital Audio Workstation (Logic, Ardour, etc): 0dB in a K14 meter (-14 dB re: full scale)
  • master level in DM1000: -10dB (blue reference lines)
  • individual channel level in DM1000: -5dB
With those settings we calibrated the SPL level at the center of the room (C curve, slow setting) to about 78dB. As we have set the channel fader to -5dB this is almost a SMPTE20 calibration. Please do NOT change the volume at the speaker, adjust SPL levels in your mix or in the DM1000 digital mixer.

Calibration dates:

Studio E: March 24 2016
Studio D:

Laptop Station

Each studio has an audio interface to connect your laptop to the system (specfically to the mixer).

Monitoring System




[This obsolete documentation was moved to the archive in September 2019.]

With the exception of the Recording Studio, Mac OS X workstations in studios have the RME HDSPe AIO interface.  See the Routing Diagram to understand how the interface connects to the mixer and monitoring systems.

There are three connection paths between the workstation and the mixer:
  1. Stereo Analog (to mixer only): for simple stereo playback.
  2. Stereo AES/EBU (digital to mixer only): for 2 channel 96kHz playback.
  3. 8 Channel ADAT (digital to and from mixer): for multi-channel I/O up to 48kHz.

  1. Start by recalling the CCRMA DEFAULT mixer setting on the Yamaha DM1000 digital mixer.  This will set up all of the connections listed above.  For this example, assume 48kHz sampling rate (a standard setup in the studios). 
  2. Verify Audio Midi Setup settings in OS X:  Open Applications > Utilities > Audio Midi Setup.   Make sure that the HDSPe AIO interface is selected for input and output and select/verify the proper sampling rate (48000).  [screenshot: proper Audio Midi Setup]
  3. The HDSPe Settings and HDSPe Mixer programs should have opened automatically when you logged in.  If not find and open them from:  Applications > HDSPe Settings/Mixer.  
  4. Verify two parameters in HDSPe Settings: Sample Rate: 48000 Hz.  Clock Mode: AutoSync.
  5.  Keep HDSPe Mixer open and visible to see levels.
  6. Open the HDSPe Mixer routing matrix:  HDSPe Mixer > View > Matrix.  If it's the first time opened, the default output is a diagonal (one-to-one) mapping.  [Matrix default image] This default mapping works only for Stereo Analog output.  ADAT and AES/EBU will not play sound without additional configuration (see below).