37C3 - Sonic Alchemy

media.ccc.de/v/37c3-11835-son...
Mehr als nur Lärm: Ein Sprint vom kleinen Audio-Einmaleins bis zum Phasealignment mit FFT-Analyzer
Mehr als nur Lärm: Ein Sprint vom kleinen Audio-Einmaleins bis zum Phasealignment mit FFT-Analyzer
Von “Disco Dieter” bis zur ausgewachsenen Stadioninstallation - gegen physikalische Grundprinzipien kann man wenig tun. Manchmal kann man Sie für sich nutzen, meistens geht man Kompromisse ein. Oft lässt sich mit einfachen Mitteln Sound verbessern.
Was ist zu tun gegen störendes Brummen? Wie versteht man Sensitivity und Gainstruktur? Was bedeutet eigentlich 'Phase'? Und wie positioniert man Subwoofer optimal? In diesem Vortrag möchte ich solche und weitere häufig auftretende Probleme bei der Verwendung von Tontechnik und Lautsprechern beleuchten. Ziel ist es, praxisnahe Lösungen und Tipps zu präsentieren, um das Beste aus deinem nächsten Projekt herauszuholen und gängige Herausforderungen erfolgreich zu meistern.
Veit
events.ccc.de/congress/2023/h...
#37c3 #HardwareMaking

[@hopefulmonsters]

Umfassend,
verständlich erklärt,
mit bunten Bildern und Memes,
vorgetragen von einem Spezialisten.
Gelungener Talk,
DANKE!

[@dameanvil]

00:00 🔊 Signal transmission can be optimized through symmetrical cabling, utilizing connectors like XLR or TRS to reduce interference and improve quality.
03:12 ⚡ Ground loops causing humming can be mitigated using ground lifts or transformers for galvanic isolation, essential for audio setups.
06:40 🔊 Sensitivity in speakers determines their loudness, but it varies with frequency, impacting overall performance.
08:09 📶 Scaling speaker setups isn't straightforward due to logarithmic perception of electrical power and loss over distance.
10:19 🌀 Acoustic interference like phase cancellations and reflections can distort sound, requiring careful speaker placement and design consideration.
13:56 🎯 Achieving consistent sound throughout a venue involves strategic speaker placement to minimize acoustic variance and reflections.
15:36 🎚 Bass response can be affected by room dimensions, requiring adjustment of speaker position to optimize sound quality.
16:48 🔊 Bass reflex design can create pronounced comb filters, affecting sound quality.
17:29 🔄 Placing all subwoofers in the center dramatically improves sound distribution and reduces cable complexity.
18:11 🎵 Using endfire bass alignment technique improves rear damping and overall sound quality.
19:50 🆙 Stacking subwoofers vertically with CSA (Cardioid Subwoofer Array) configuration offers space-efficient solutions while maintaining sound quality.
23:02 🛠 Combining endfire or CSA stack with a curve design helps to minimize side cancellation and improve sound coverage.
24:33 📊 Understanding target curves and phase alignment is crucial for optimizing sound systems.
28:28 🎤 Utilizing a two-channel measurement setup with an FFT Analyzer helps compare the system response with and without delay effects.
32:53 🔄 Achieving congruent alignment between subwoofers and top speakers at the acoustic crossover point is essential for optimal sound coherence.
34:04 🎚 Rational Acoustic Smart and AFMG Sune are commonly used tools for audio analysis, with other options like Rita, RDNet Measure, and Room EQ Wizard available, each with its own features and focus.
35:00 🔄 Ensure digital or balanced analog connectivity throughout to maintain audio integrity, avoiding issues like unbalanced connections that can lead to interference.
35:15 🔊 Proper speaker positioning, especially angling and height adjustments, significantly impacts sound quality, particularly crucial for subwoofers.
35:30 📐 Consider face alignment for optimal sound, although it requires practice, and avoid over-measuring as it can disrupt other trades working on the project.
36:50 💡 Troubleshooting electrical hums in audio setups might involve various factors like inadequate grounding or poor cable shielding, necessitating thorough investigation.
37:55 🎛 Feedback issues from speaker rear radiation can be mitigated through directional adjustments, microphone selection, or delay techniques, depending on the frequency range involved.
39:36 🏢 Addressing sound leakage in shared spaces, like a basement studio, might be challenging due to the nature of low-frequency waves and room construction materials.
40:49 🖥 Commercial software like EASE Focus 3 and Mapp provide robust solutions for visualizing sound propagation, although open-source alternatives are limited in functionality and data accuracy.
41:47 ⚖ Understanding the principles of sound interference, like the backfire effect, aids in addressing issues such as phase cancellation between multiple sound sources.
42:40 🛡 While immersive surround sound systems are trendy, they often suffer from phase issues and artifacts, with no definitive solution available for flawless implementation.

[@HDCowles]

Could you please do this with like every single video in the interwebs? 🥹🥰 Thx!

[@frankdererste]

Kurz und knackig und doch so viel Interessantes. Danke dafür.

[@HDCowles]

es heisst TSCHINSCH

[@DgaDM]

Unter dem Titel konnte ich mir nichts vorstellen, bin positiv überrascht. Sehr interessant!

[@janoschluccamarek]

Schöne Zusammenfassung. Ich mag die Font 😊

[@lbgstzockt8493]

Sehr guter Talk, die Parallelen zur Antennen- und HF-Technik sind faszinierend.

[@Superjohnlocke]

Dankeschön, cooler Vortag!

[@fonesrphunny7242]

Nächste Woche Umzug ins neue Studio. Da kam dieser Refresher genau richtig!

[@simonwe1102]

Danke für den Vortrag

[@Matze0480]

Top Beitrag

[@kautzz]

richtig gut, danke

[@peterbrusch5369]

super!!

[@rewIndustry]

can we get these talks in english? ek het nie deutsch nie, net afrikaans, en die is sleg, ek kannie volgen.