Main Page

From MDD

The Library of Congress, National Library Service for the Blind and Physically Handicapped

Materials Development Division

DTB & e-braille Mobile Applications

iOS Application

• Pre-Beta testing IOS Pre-Beta

Android Application

• Pre-Beta testing Android Pre-Beta

---

MDD Lecture Series

• August 1st 2012, Michael Katzmann: Anatomy of a DTB

---

Digital Talking Book Machine Information

Hot Topics Battery Charging Issues State of charge of battery for players shipped from manufacturer. Upgrading Software Documentation Warranty repair Preparation for distribution to patrons Maintenance

---

Digital Talking Book Cartridge Information

Hot Topics Use of conventional USB flash drives Cartridge cost to Network Warranty replacement Capacity of drives

---

Standards

• Digital Talking Book Standard (Z39.86:2002) (PDF)

Laws and Regulations

• NLS/BPH Laws, Regulations and Statutes

---

DTBM Comparison to C1

	C1	DTB	Difference
Size	9" Wide; 11" Deep, 3" High (297 Cubic Inches)	6.2" Wide; 8.8" Deep, 1.7" High (93 Cubic Inches)	less than 1./3 the size
Weight	5lb 4.8oz	2lb 8.4oz	less than 1/2 the weight
Overpack	4	8
Battery Capacity	8 hours (NiCd Battery)	greater than 30 hours	three time the play time
Longest Continuous Playtime	88 minutes	more than 90 hours (1GB)	more than 60 times playtime without intervention.
Audio frequency range	250Hz to 7KHz	200Hz to greater  than 12KHz

Cartridge and Container

	Cassette (avg. 2)	DTB	Difference
Container Size	4.4" Wide; 6" Deep, 1.5" High (39.6 Cubic Inches)	4.4" Wide; 6" Deep, 0.75" High (19.8 Cubic Inches)	half the size
Weight with media	7.7 oz	5.19 oz	2/3 the weight
Weight of media/label		1.32 oz
Weight of Container		3.87 oz