Ce micro n’est pas “juste un micro Lumix”. ( DMS1 )

Understanding the Lumix DMS1 Microphone

Introduction to the Lumix DMS1 Microphone

• The Lumix DMS1 microphone is priced at €400, prompting a discussion on its value and utility.

• The speaker offers masterclasses for users of various Lumix camera models, emphasizing their extensive content aimed at mastering video and photography.

Technical Specifications

• The DMS1 features a four-capsule design with each capsule measuring 10 mm, which significantly impacts sound quality.

• A larger membrane (10 mm) captures more acoustic energy, resulting in a stronger electrical signal and reduced amplification needs, leading to less noise.

• Compared to competitors like Sony's EM BAM with smaller capsules, the DMS1 aims for a more natural sound through fewer but larger elements.

Comparison with Other Microphones

• The speaker conducts tests comparing the DMS1 against Sony's ECMBAM and Nikon's MD10 microphones to showcase differences in audio quality.

• Previous models like the Lumix DMW MS2 are discussed; while favored by the speaker, they have limitations regarding connectivity and audio recording capabilities.

Limitations of Older Models

• The older MS2 model cannot utilize flash grip connections for direct input without additional cables, which can be inconvenient.

• It also lacks access to 32-bit float recording on certain Lumix cameras when used, necessitating careful gain adjustments during use.

Understanding Audio Recording Concepts

• The speaker clarifies that 32-bit floating point recording is akin to RAW audio format; it allows capturing a wide dynamic range without distortion from preamps or mic capsules.

• Three key concepts are distinguished: maximum SPL (Sound Pressure Level), dynamic range, and 32-bit float recording—each affecting different aspects of audio capture.

Microphone Dynamics and Recording Techniques

Understanding Microphone Pressure and Dynamic Range

• The microphone is designed to handle acoustic pressure, suitable for typical concert environments but may struggle in high-pressure situations like heavy metal concerts.

• The dynamic range of the UMIX DMS1 microphone is 105 dB, indicating a significant difference between the microphone's internal noise and its maximum usable level. Higher values allow for finer nuances at elevated levels.

• In digital recording, 32-bit floating point allows for extensive headroom; signals exceeding 0 dBFS can be recovered without distortion during post-production, unlike traditional 24-bit recordings.

Digital vs. Analog Limitations

• While 32-bit floating point protects against digital clipping, it does not prevent analog saturation from occurring upstream in the signal chain (e.g., capsule or preamp clipping).

• Sound quality relies on a balance among the capsule, electronics, and conversion processes rather than any single specification. This balance determines the final audio output quality.

Features of the DMS1 Microphone

• The DMS1 offers six directional patterns accessible via physical buttons: cardioid front, supercardioid front/rear, bidirectional, stereo 90°, and wide stereo 120°.

• The bidirectional mode is particularly useful in certain recording scenarios where capturing sound from two directions is beneficial.

Practical Testing with Equipment

• During testing with Lumix S12 and RS4 Mini setups, there were complaints about dead band settings affecting performance; however, overall usability remained satisfactory.

• A preference was expressed for specific Sony equipment (Burano with a 50-150 lens), highlighting personal gear choices that impact user experience.

Capturing Ambient Sound Effectively

• Utilizing wide stereo mode effectively captures ambient sounds while allowing for additional microphones to cover voice from a distance.

• Combining different microphones can enhance environmental sound capture; positioning capsules upward aids in creating an immersive audio bubble.

Design Considerations and Improvements

• Despite positive feedback on functionality, concerns were raised regarding the plastic construction of a €400 microphone and lack of visual indicators for recording status.

• Suggestions included adding features such as secure attachments for protection against damage and utilizing additional input channels to enhance versatility in recording setups.

Backup Modes and Microphone Insights

Overview of Backup Modes

• The microphone offers a backup mode that records sound on four channels, with channels 3 and 4 capturing audio from all directions. Channel 4 is set at -20 dB relative to the gain settings, providing an ultimate backup option.

• A second backup mode retains the chosen directivity across all channels but also sets channels 3 and 4 at -20 dB. This feature is particularly beneficial for Lumix users without internal recording capabilities in 32-bit floating format.

Importance of Dual Backup

• The concept of a "true double backup" is introduced, where audio is recorded both through DJI Mike 3 and internally via the new Lumix microphone. This ensures redundancy in case one source fails.

• Interference can disrupt wireless audio transmission; thus, having an internal recording serves as a safeguard against potential issues during recordings in challenging environments like construction sites.

Practical Application and User Experience

• In scenarios with high-tension power lines or other interference sources, relying solely on external receivers may lead to compromised audio quality. Internal recording provides a reliable alternative.

• If the DJI Mic 3 were to fail, the internal recording would still capture usable audio, emphasizing the importance of having multiple layers of security in audio capture.

Additional Features and Considerations

• The microphone does not hinder the use of accessories like grips; it remains compatible with setups designed for XLR modules.

• Noise reduction features are discussed as somewhat ineffective compared to post-production solutions; personal preference leans towards using isolation techniques during editing rather than relying on built-in noise reduction.

Longevity and Ecosystem Dependency

• Users should consider that investing €400 in this microphone ties them to the Lumix ecosystem; future compatibility may be uncertain if Lumix changes its product line.

• While this microphone offers convenience for those who prefer simplicity over complex setups (like traditional cables), users comfortable with manual adjustments might find more durable alternatives better suited for long-term use.