MUS423 Research Seminars

The CCRMA Music 423 Research Seminar brings graduate students and supervising faculty together for planning and discussion of original research. Students and faculty meet either in small groups or individually, as appropriate for the research topics and interests of the participants. Research carried out is typically presented at the weekly CCRMA Colloquium (if it is of general interest to the CCRMA community) or at a Special DSP Seminar scheduled for that purpose.  In either case, announcements appear on the CCRMA Home Page as Upcoming Events.

Recent DSP Seminars

  • Banging Like an 808? Developing a Physically-Informed, Circuit-Bendable, Digital Model of the Roland TR-808 Rhythm Composer

    Date: 
    Mon, 03/03/2014 - 5:30pm - 7:00pm
    Location: 
    CCRMA Classroom
    Event Type: 
    DSP Seminar
    Can a digital system provide satisfactory emulations of classic analog musical instruments and effects? Polarized reactions to the impending release (this month!) of Roland's TR-8 Rhythm Performer (a digitally modeled TR-808/909) have reignited this old debate. I've focused my research on creating physically-informed, circuit-bendable, digital models of analog drum machines. At this DSP Seminar, I'll present my methodological framework and analysis/models of one of the 808's most famous sound generators: the bass drum. My digital model, implemented in Cycling 74's Gen~, retain the salient features of the original analog drum machine and allow for accurate emulation of circuit-bending and common 808 mods. This work takes an engineering approach to hacking and circuit bending, clears up misconceptions about the 808's circuitry, and plugs a conspicuous drum-machine-shaped gap in virtual analog research.
    FREE
    Open to the Public
  • ISSE: An Interactive Source Separation Editor, Part II

    Date: 
    Tue, 11/12/2013 - 5:30pm - 6:45pm
    Location: 
    CCRMA Classroom
    Event Type: 
    DSP Seminar

    Abstract:  In the second talk of a two-part series, we will further discuss ISSE--an interactive source separation editor.  As described earlier, ISSE is a new, open-source, freely available, cross-platform audio editing software tool which enables a user to perform single-channel source separation by painting on time-frequency visualizations of sound. It is useful for a variety of music- and audio-related tasks such as music remixing, audio denoising, and audio-based forensics.   

    FREE
    Open to the Public
  • ISSE: An Interactive Source Separation Editor, Part I

    Date: 
    Tue, 10/29/2013 - 5:30pm - 6:45pm
    Location: 
    CCRMA Classroom
    Event Type: 
    DSP Seminar

    Abstract:  In the first talk of a two part-series, we will introduce ISSE--an interactive source separation editor.  ISSE is a new, open-source, freely available, cross-platform audio editing software tool which enables a user to perform single-channel source separation by painting on time-frequency visualizations of sound. It is useful for a variety of music- and audio-related tasks such as music remixing, audio denoising, and audio-based forensics.  In addition, we will discuss how to use the software, give demos, provide tips and tricks on achieving the high-quality separation, and outline limitations of the software. For more information, please see http://isse.sourceforge.net

    FREE
    Open to the Public
  • Source Separation Tutorial Mini-Series III: Extensions and Interpretations to Non-Negative Matrix Factorization

    Date: 
    Tue, 04/16/2013 - 5:30pm - 7:30pm
    Location: 
    CCRMA Classroom
    Event Type: 
    DSP Seminar

    Abstract: Building off the last two lectures in the series, we will continue our discussion on non-negative matrix factorization techniques for source separation.  We will talk about common extensions, additional interpretations, methods of evaluation, and if time permits, future directions of research.  Following the lecture, we will get a chance to program and improve our basic separator from the second lecture. Please bring your laptops with Matlab and/or Octave installed and be ready to code!

    Slides + Code @ https://ccrma.stanford.edu/~njb/teaching/sstutorial/

    FREE
    Open to the Public
  • Source Separation Tutorial Mini-Series II: Introduction to Non-Negative Matrix Factorization

    Date: 
    Tue, 04/09/2013 - 5:30pm - 7:30pm
    Location: 
    CCRMA Classroom
    Event Type: 
    DSP Seminar

    Abstract: For the second talk in this series, we will introduce the topic of non-negative matrix factorization for the purpose of single-channel source separation.  NMF is one of the current most promising and effective class of approaches found for source separation and is a popular topic in several signal processing conferences and journals.  Following the lecture, we will get a chance to program a basic source separator. Please bring your laptops with Matlab and/or Octave installed and be ready to code!

    Slides + Code @ https://ccrma.stanford.edu/~njb/teaching/sstutorial/

    FREE
    Open to the Public
  • Source Separation Tutorial Mini-Series I: Classical Speech Denoising and Enhancement

    Date: 
    Tue, 04/02/2013 - 5:30pm - 7:30pm
    Location: 
    CCRMA Classroom
    Event Type: 
    DSP Seminar

    Abstract: To start off a series of three tutorial-style dsp seminars on current single-channel source separation methods, the first talk will introduce the topic of classical methods used for speech enhancement. We will cover denoising methods such as spectral subtraction, wiener filters, and probabilistic estimators (if time permits). This will give an overview of the large range of literature on reducing background noise from speech.

    FREE
    Open to the Public
  • POSTPONED! Source Separation Tutorial Mini-Series I: Classical Speech Denoising and Enhancement

    Date: 
    Tue, 02/19/2013 - 5:30pm - 7:00pm
    Location: 
    CCRMA Seminar Room [Knoll 315]
    Event Type: 
    DSP Seminar
    This event has been postponed.  An announcement will be made when a new date is announced.
    FREE
    Open to the Public
  • Audio Applications of Matrix Completion

    Date: 
    Tue, 11/27/2012 - 5:30pm - 7:00pm
    Location: 
    CCRMA Classroom [Knoll 217]
    Event Type: 
    DSP Seminar

    "Audio Applications of Matrix Completion" --- Statistics PhD student Dennis Sun

    FREE
    Open to the Public
  • Clustering and Synchronizing Multi-Camera Video via Audio Fingerprinting

    Date: 
    Tue, 11/13/2012 - 5:30pm - 6:50pm
    Location: 
    CCRMA Classroom [Knoll 217]
    Event Type: 
    DSP Seminar
    A method to both identify and synchronize multiple videos of the same event within a large collections of videos and/or audio files will be discussed. Landmark-based audio fingerprinting is used to match multiple recordings of the same event together and time-synchronize each file within the groups. Compared to prior work, we offer improvements towards event identification and a new synchronization refinement method that resolves inconsistent estimates and allows non-overlapping content to be synchronized within larger groups of recordings.
    FREE
    Open to the Public
  • User-Guided Variable-Rate Time-Stretching via Stiffness Control

    Date: 
    Tue, 11/06/2012 - 5:30pm - 6:50pm
    Location: 
    CCRMA Classroom [Knoll 217]
    Event Type: 
    DSP Seminar
    User-Guided Variable-Rate Time-Stretching via Stiffness Control
    CCRMA PhD students Nick Bryan & Jorge Herrera
    FREE
    Open to the Public