XOVER-4W/M 1.00
(Code S003-95-572-100)
by S.E.E.D.

Software Overview

TMS57002 implementation of a four-way mono cross-over, it accepts linear 16-bit data. The 
cross-over consists in four filters: a low-pass filter with high-cut frequency variable from 31.5 
Hz to 800 Hz; two band-pass filters with low- and high-cut frequencies variable from 31.5 Hz to 16 
kHz; and a high-pass filter with low-cut frequency variable from 1 kHz to 16 kHz; optionally it is 
possible to insert also a high-pass filter with low-cut frquency of 15 Hz useful to eliminate 
subsonic noise. With the cross-over it is possible to correct a phase error on each output channel 
introducing a 5-ms maximum delay reachable using 21-ms steps.

Features and Benefits

•	Hi-Fi quality, up to 48-kHz sampling frequency
•	Possibility to transform the four-way cross-over in a two- or three-way cross-over

Processor and System Requirements

•	TMS57002-based systems, using 32-kwords RAM minimum

Usage Limitations or Performance Considerations

•	Real-time for 48-kHz sampling frequency

Algorithm Verification

•	Write directly in DASP 57002 assembly code.
•	The calculated output of the algorithm matches with the laboratory measures.

Availability

Written by S.E.E.D. and available 2Q 95.

Company Background and Contact Information

S.E.E.D. is an association of electronic engineers and computer science specialists, founded in 
1993 and based in Massa, Italy. S.E.E.D. operates in the DSP field giving consulting about specific 
applications of the customers and is able to design or to integrate systems on request. S.E.E.D. 
has developed its own DSP-based hardware and software platforms. S.E.E.D. is able to provide and 
support custom turn-key system solutions in the following fields: real-time applications design, 
digital signal processing with a concentration in digital audio.
Contact: 	Mr. M. Marani
		S.E.E.D.
		Viale Roma 88/A
		54100 Massa
		Italy
		(++39) 335 372256
		e-mail: mc4453@mclink.it