Wednesday, July 10, 2013

TOA Introduces New DP-SP3 Digital Speaker Processor

TOA Electronics, Inc., a subsidiary of TOA Corporation, revealed its new DP-SP3 Digital Speaker System Processor at InfoComm13. The DP-SP3 is 2-input x 6-output DSP operating at 24bit/96k resolution and is designed to handle all speaker system management functions.  It is housed in a 1U chassis and can be connected to other system components via balanced removable Euro-block connectors. The DSP includes comprehensive tools for achieve optimized sound system performance including: 12-band filter section per channel (with a choice of parametric, Hi or Low shelving, HPF/LPF, notch, band-pass, all-pass & horn eq. different slope types are also selectable), Compression, Delay and Attenuation. The DP-SP3 can be programmed and controlled via proprietary GUI software connected via Ethernet to a Windows PC. It can also function with any web browser and allows access to basic functions (such as passwords and IP settings) plus a library of TOA speaker EQ/Crossover presets. The DP-SP3 may also be synchronized for preset selection along with the M-864D Digital Mixer by using the provided contact Ins & Outs. The DP-SP3 carries TOAs 5-year Audio Product Warranty.

Monday, July 1, 2013

Troubleshooting RS-232 Command Strings to TOA Products

By Rick Escobar - TOA Product Support Assistant Manager
One issue we hear from time to time is that “My Brand X” controller cannot control a TOA product by sending RS-232 commands.

For this example, let’s refer to a 9000M2 series Matrix / Mixer Amplifier (for you references download this document “9000M2 RS-232C Protocol Manual” by clicking here).

We’ll skip the low level detail and get to the point on how to make your control surface work for you. The 9000M2 is looking for a hexadecimal string that it will read, then react to the instructions sent.

Here is an excerpt from the “9000M2 RS-232C Protocol Manual”:

5.5 Power ON/OFF

This command performs ON/OFF setting of the power switch of the 9000M2 Series
Amplifier. 9000M2 Series Amplifier responds with the same data as that received.

F4H, 01H, <ON/OFF>

Example 1: Setting the power switch to OFF
    F4H, 01H, 00H

Example 2: Setting the power switch to ON.
    F4H, 01H, 01H


A common misconception is that the H is required in the command string. However, in this case it’s just noting that F4 is going to be a hexadecimal number. There is no standard for different control manufactures or terminal programs. So the first step to understand how the device you are working with, is going to want this string formatted.

All of these examples could be valid to power the 9000M2 off:
And so forth. 

The best recommendation would be to have the ability to cross check a string with a Terminal Program. This way if the hardware controller does not work, but the software terminal does, then you have isolated the issue most likely to how the device in question wants the string formatted.

A key word search on the internet for “RS-232 terminal emulator” will turn up several programs that provide you the ability to send RS-232 to your TOA product.

Good Luck and Happy RS-232 Programming!