X0201 4 2004-04-08 1 0000853695 DIGITAL RECORDERS INC TBUS 0001276530 TRANSIT VEHICLE TECHNOLOGY INVESTMENTS INC 0 0 1 0 0001277214 CHU Y PING 3306 KINGSTON DR RICHARDSON TX 75082 0 0 1 0 Common Stock 2004-04-08 4 S 0 1200 9.77 D 297190 D Common Stock 2004-04-08 4 S 0 2000 9.78 D 295190 D Common Stock 2004-04-08 4 S 0 6100 9.8 D 289090 D Common Stock 2004-04-08 4 S 0 5990 9.82 D 283100 D Common Stock 2004-04-08 4 S 0 2000 9.9 D 281100 D Common Stock 2004-04-08 4 S 0 2000 10.14 D 279100 D By: /s/ Damon D. McDonald, Chief Operating Officer, on behalf of Transit Vehicle Technology Investments Inc. 2004-04-13 By: /s/ Damon D. McDonald, by power of attorney, on behalf of Y-Ping Chu 2004-04-13