Recording level, Remote recording | Dynacord DMM 4650 guide

Recording level

An integrated, electronic control automatically adjusts the input sensitivity of the DMM 4650’s (Mic, Line, Rec. Inp) inputs. This level setting remains unchanged, until the question “Select new recording level?” is answered by using the soft key “y=yes” before starting a new recording. By using a short test signal marks the new setting of the control which is automatically stored. Pressing the soft key “ok” exits the recording level menu.

Adjusting the recording level only becomes necessary when the connected signal source is changed or major level changes occur.

Remote recording

It is possible to activate a recording via one of the control inputs (ports A .. D). An example given in the list of factory sequences (S29, S30) on the pages 40-41. The message defined within the sequence is automatically erased before the new recording starts. The example employs an indication lamp for start recording (= deleting end) and the maximum recording time is set to 10 seconds.

Adjusting the recording level corresponds to the description in the previous paragraph. The message’s audio quality setting stays unaltered as well. The priority number of the sequence gets copied to the priority of the message.

Audio quality, recording duration

Prior to recording a message, “recording type” is shown on the display. The cursor keys are used to alter the audio cutoff frequency (16 kHz, 8 kHz, 4 kHz) and the signal quality (CD = 16 bit linear, long = 8 bit, µ-Law). The factory default setting is “8 kHz long” for all messages. The newly set audio quality is maintained and individual adjustment for each message is possible.

Table for recording time (minutes) versus audio quality and installed sound memory extension (NR 90205).

Accuracy	CD			long*
bandwidth	4 kHz	8 kHz	16 kHz	4 kHz	8 kHz	16 kHz

without NR 90205	2 min	1min	0,5 min	4 min	2 min	1 min
1x NR 90205	4 min	2 min	1 min	8 min	4 min	2 min
2x NR 90205	6 min	3 min	1,5 min	12 min	6 min	3 min
3x NR 90205	8 min	4 min	2 min	16 min	8 min	4 min

*The specified times for the"long" recording mode are minimum values since the active data reduction recognizes pauses in the audio signal. Pauses are defined as passages where the signal level drops -70 dBu below full modulation.

Message memory extension

It is possible to extend the sound memory capacity of the appliance by incorporating up to three additional plug-in boards (extension kit NR 90205). The corresponding recording times are specified in the table above. The flash memories have to be formatted after insertion (see menu “system setup” > “format flash”).

Asterisk (*) behind message duration

An asterisk * behind the message recording time display signals that the corresponding data has been corupted. The error is shown by the blinking Power-LED. In case you decide that the audio quality is sufficient, after listening to the recording, you have to enter the menu “confirming” (page13) to delete the *-sign. If the result is not tolerable, the only solution is re-recording the message. To omit the blinking Power-LED you have to acknowledge error no. 14 in the “self-test” menu (page 29).

DMM 4650 specifications

The Dynacord DMM 4650 is a powerful and versatile digital mixing console designed for professional audio applications. Built with cutting-edge technology and years of expertise in the audio industry, the DMM 4650 is a go-to solution for live sound engineers, rental companies, and permanent installations.

One of the primary features of the DMM 4650 is its 32 input channels, allowing for seamless integration of multiple sound sources. Each channel is equipped with high-quality preamps that deliver a clean, transparent sound. The console also includes 16 bus outputs, enabling flexible routing options for different sound systems, whether for front-of-house, monitors, or recording purposes.

The DMM 4650 comes with an intuitive user interface, highlighted by a large touchscreen display that provides clear access to all essential parameters and features. This interface allows users to navigate quickly through settings, making adjustments in real-time without disrupting the audio flow. Additionally, the console supports multiple layers of channels, giving engineers the ability to work efficiently during complex shows.

One standout technology incorporated in the DMM 4650 is its digital signal processing (DSP) capabilities, which include high-quality equalizers, dynamics processors, and effects units. The onboard DSP can manage multiple effects such as reverb, delay, and modulation, giving users a wide range of sound-shaping tools. Moreover, the DMM 4650 features an advanced audio networking option, allowing for easy connectivity with other digital equipment and systems, promoting a streamlined workflow.

Robust connectivity is a hallmark of the DMM 4650, which sports both analog and digital outputs, including AES/EBU and MADI options. This flexibility ensures that the console can adapt to various setups and can coexist with existing audio infrastructure without hassle.

Durability is also a key characteristic of the DMM 4650. Designed for the rigors of live performance, the console's rugged construction ensures reliable operation in demanding environments. Whether it's a large concert, corporate event, or installation in a house of worship, the DMM 4650 is engineered to deliver outstanding performance consistently.

In conclusion, the Dynacord DMM 4650 is a comprehensive digital mixing console that combines advanced technology with user-friendly features. Its high-quality audio processing, extensive connectivity options, and robust build make it an excellent choice for audio professionals looking to elevate their sound mixing capabilities.