Matthew J. Dovey

Polyphonic Score Retrieval Using Polyphonic Audio Queries: A Harmonic Modeling Approach

This paper extends the familiar “query by humming” music retrieval framework into the polyphonic realm. As humming in multiple voices is quite difficult, the task is more accurately described as “query by audio example,” onto a collection of scores. To our knowledge, we are the first to use polyphonic audio queries to retrieve from polyphonic symbolic collections. Furthermore, as our results will show, we will not only use an audio query to retrieve a known item symbolic piece, but we will use it to retrieve an entire set of real-world composed variations on that piece, also in the symbolic format. The harmonic modeling approach which forms the basis of this work is a new and valuable technique which has both wide applicability and future potential.

ShibGrid: Shibboleth Access for the UK National Grid Service

This paper presents work undertaken to integrate the future UK national Shibboleth infrastructure with the UKs National Grid Service (NGS). Our work, ShibGrid, provides both transparent authentication for portal based Grid access and a credential transformation service for users of other Grid access methods. The ShibGrid support for portal-based transparent Grid authentication is provided as a set of standards-based drop-in modules which can be used with any project portal as well as the NGS project in which they are initially deployed. The ShibGrid architecture requires no changes to the UK national Shibboleth authentication infrastructure or the NGS security infrastructure and provides access for users both with and without UK e-Science certificates. In addition to presenting both the architecture of Shib- Grid and its implementation, we additionally place the ShibGrid project within the context of other efforts to integrate Shibboleth with Grids.

Analysis of Rachmaninoff's Piano Performances Using Inductive Logic Programming (Extended Abstract)

The project outlined here is an attempt to use inductive logic programming ([6]) to determine various interpretative rules which the pianist, Sergei Rachmaninoff , may have used during his pianoforte performances. During the 1920s Rachmaninoff recorded a number of recitals on the Ampico Recording Piano ([4]). This method of capturing the performance not only recorded the notes, duration and tempo, but also the dynamics of the key pressure and pedalli ng, in a digital (in actual fact, binary) form, which easily lends itself to conversion into a computer readable form. To complement this performance information, it was also necessary to represent the musical structure of the piece being performed, so that a general analysis could be performed, rather than one specific to that particular piece. For simplicity, only the melodies of the pieces involved were subjected to analysis, although better results may be obtained from a full analysis of the accompanying harmonic and contrapuntal structures. The two sets of information, structural analysis and performance analysis were encoded into PROGOL scripts ([5]), which were used to attempt to determine general rules (in the form of universal predicates) underlying the data set. Two pieces were analysed in this manner: Rachmaninoff’ s Prelude in C sharp minor, opus 3 number 2 (Ampico roll number 57504) and Mendelssohn’s Song without Words Opus 67 number 4 (Ampico Roll number 59661).

Overview of the OMRAS project: online music retrieval and searching

Until recently, most research on music information retrieval concentrated on monophonic music. Online Music Retrieval and Searching (OMRAS) is a three-year project funded under the auspices of the JISC (Joint Information Systems Committee)/NSF (National Science Foundation) International Digital Library Initiative which began in 1999 and whose remit was to investigate the issues surrounding polyphonic music information retrieval. Here we outline the work OMRAS has achieved in pattern matching, document retrieval, and audio transcription, as well as some prototype work in how to implement these techniques into library systems.

Digital music libraries - research and development

Digital music libraries provide enhanced access and functionality that facilitates scholarly research and education. This panel will present a report on the progress of several major research and development projects in digital music libraries.

JAFER Toolkit Project

Purpose – The paper looks at the JAFER Toolkit Project. Design/methodology/approach – The paper describes the JAFER toolkit for developing Z39.50 clients and servers using XML and XSLT and investigates how it might be used. Findings – It has already been used on a number of projects and is being migrated to open source to enable further collaborative development by its users. Originality/value – The paper is useful for those wishing or planning to use the JAFER Toolkit.

JAFER ToolKit project: interfacing Z39.50 and XML

In this paper, we describe the JAFER ToolKit project which is developing a simplified XML based API above the Z39.50 protocol[1]. The ToolKit allows the development of both Z39.50 based applications (both clients and servers) without detailed knowledge of the complexities of the protocol.