App Note:
How Much Flash Do I Need?
Determining Playback Duration For Different File Types

Many Alcorn McBride Digital Audio and Video Products utilize flash media for audio/video storage and playback. It's easy to find these storage devices from a variety of manufacturers, but if you're not purchasing your media from Alcorn McBride you should verify the brand has been tested and shown to work at the data playback rates needed by your product. That information is in your user manual, or may be obtained from our technical support department.

Alcorn McBride recommends SanDisk Brand Flash Memory. Thousands of our products are in use with these devices, and our customers have had very good results with them. They are compatible with all of our products, and can handle the high bitrate demands of video playback. If you're contemplating using a different brand, please check with us about compatibility.

The next step is to determine how large a device you need. This guide will help you do that.

Director of Engineering
 
Equipment
Audio

8-TraXX/E
ProTraXX TourTraXX
AM4
Digital Binloop

Video

DVM-7400
Video Binloop DVM-8400
Digital BinloopHD

Lighting LightCuePro LightCue with Ethernet

Step 1 - Identify Your Product

The first step in determining the flash card your application requires is to identify what type of audio or video will be stored on it, as well as the total length of the presentation. The following Alcorn McBride products use flash media for the storage of audio/video data:

Digital Audio Machine
Model AM4

MP3 Stereo Audio
16-Bit PCM Stereo or Mono Audio (44.1KHz, 48kHz)
All Compact Flash sizes supported

Digital Video Machine
Model 7400

MPEG2 Video at 8Mbps (15 Mbps max)
All Compact Flash sizes supported

ProTraXX
8Traxx/E
TourTraXX

MP3 Stereo Audio (up to 8 independent tracks at once)
All Compact Flash sizes supported


Digital Binloop (Repro24D)

16-Bit PCM Stereo or Mono Audio (44.1KHz, 48KHz, 96kHz)
24-Bit PCM Stereo or Mono Audio (44.1kHz, 48KHz, 96KHz)
MPEG2 SD Video at 8Mbps (15 Mbps max)
All Compact Flash sizes supported

Video Binloop (Repro16V)

16-Bit PCM Stereo or Mono Audio (44.1KHz, 48KHz)
MPEG2 SD Video at 8Mbps (15 Mbps max)
All Compact Flash sizes supported

LightCue with Ethernet

1 Universe of DMX Lighting Data
512 Channels of DMX Recorded Every Frame
All Compact Flash sizes supported

LightCue Pro

1-4 Universes of DMX Lighting Data
512 Channels of DMX Recorded Every Frame (Per Universe)
All Compact Flash sizes supported

Digital Binloop HD (ReproHD)

MPEG2 HD Video at 30 Mbps (40 Mbps max)
H.264 HD Video at 20Mbps (30 Mbps max)
All Compact Flash sizes supported

Digital Video Machine HD
Model 8400
Model 8500

MPEG2 HD Video at 30 Mbps (40 Mbps max)
H.264 HD Video at 20Mbps (30 Mbps max)
All Compact Flash sizes supported

   

Step 2 - Determine the Storage Device Size

The final step is to select the correct size of storage device for your application from the selection chart below. For example, let's say you have a Digital Binloop and wish to play a total of 20 minutes of CD-quality (44.1KHz sampling rate) stereo sound effects from a single reproducer. According to the Audio chart, you would need to purchase a 256MB storage device (or larger) to store the required amount of audio.

Here's a handy Flash Memory Size Calculator.

Playback lengths are listed in minutes unless indicated otherwise. The actual storage capacity of your card may vary slightly according to the manufacturer's specifications.

 

Audio

 

MP3

16-Bit PCM Audio

24-Bit PCM Audio

Media Size

Variable
128kbps

44.1KHz (Mono)

48KHz (Mono)

44.1KHz (Stereo)

48KHz (Stereo)

48KHz (Mono)

96KHz (Mono)

48KHz (Stereo)

96KHz (Stereo)

64 MB

1 hour

12

11

6

6

8

4

4

2

128 MB

2 hours

24

22

12

11

14

7

8

4

256 MB

4 hours

48

44

24

22

30

15

15

7

512 MB

8 hours

97

89

48

44

1 hour

30

30

15

1 GB

16 hours

3 hours

3 hours

96

89

2 hours

1 hour

1 hour

30

2 GB

32 hours

6 hours

6 hours

3 hours

3 hours

4 hours

2 hours

2 hours

1 hour

4 GB

64 hours

12 hours

12 hours

6 hours

6 hours

8 hours

4 hours

4 hours

2 hours

8 GB

128 hours

24 hours

24 hours

12 hours

12 hours

16 hours

8 hours

8 hours

4 hours

16 GB

256 hours

48 hours

48 hours

24 hours

24 hours

32 hours

16 hours

16 hours

8 hours

32 GB

512 hours

96 hours

96 hours

48 hours

48 hours

64 hours

32 hours

32 hours

16 hours

 

Video

 

MPEG-1 SD Video

MPEG-2 SD Video

MPEG2 HD Video

H.264 HD Video

Media Size

3Mbps (CBR)

8Mbps (CBR)

30 Mbps (CBR)

20 Mbps (CBR)

1 GB

46

17

5

7

2 GB

91

34

10

14

4 GB

3 hours

1 hour

20

29

8 GB

6 hours

2 hours

40

1 hour

16 GB

12 hours

4.5 hours

80

2 hours

32 GB

24 hours
9 hours

2.5 hours

4 hours

64 GB

48 hours
18 hours

5.5 hours

8 hours

128 GB

96 hours
36 hours

11 hours

16 hours

 

Lighting

 

1 Universe

2 Universes

3 Universes

4 Universes

Media Size

123Kbps

246Kbps

369Kbps

492Kbps

64 MB

1 hour

30

20

15

128 MB

2 hours

1 hour

40

30

256 MB

4 hours

2 hours

80

1 hour

512 MB

8 hours

4 hours

160

2 hours

1 GB

16 hours

8 hours

5 hours

4 hours

2 GB

32 hours

16 hours

10 hours

8 hours

4 GB

64 hours

32 hours

20 hours

16 hours

8 GB

128 hours

64 hours

40 hours

32 hours

16 GB

256 hours

128 hours

80 hours

64 hours

32 GB

512 hours

256 hours

160 hours

128 hours

64 GB

1024 hours

512 hours

320 hours

256 hours





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