Exhibit 99.1
Form 4 Joint Filer Information


Name:		CTI Limited

Address:	c/o Creative Technology Ltd.
		31 International Business Park
		Creative Resource
		Singapore 609921

Designated Filer:  Creative Technology Ltd.

Issuer & Ticker Symbol:  SigmaTel, Inc. (SGTL)

Date of Event Requiring Statement:  February 17, 2005

Signature:	By:  /s/ Ng Keh Long
		Name:  Ng Keh Long
		Title:  President



Name:		CTI II Limited

Address:	c/o Creative Technology Ltd.
		31 International Business Park
		Creative Resource
		Singapore 609921

Designated Filer:  Creative Technology Ltd.

Issuer & Ticker Symbol:  SigmaTel, Inc. (SGTL)

Date of Event Requiring Statement:  February 17, 2005

Signature:	By:  /s/ Ng Keh Long
		Name:  Ng Keh Long
		Title:  President