The recording process began with Morissette’s demos tracked in Canada, which already functioned as strong working masters. These were then expanded upon in Los Angeles, where full band performances were layered over the original ideas. Sessions took place across several studios including Scream Studios and The Dog House, with additional mixing work at Henson Studios on an SSL 9000J console. The production retained much of the immediacy of the demos, with a focus on preserving “demo moments” while expanding the arrangements into full productions.
Tracking combined both digital and analogue systems. Pro Tools was used extensively as a multitrack and editing platform, while Sony 3348 digital tape machines were also employed during the process. Much of the material ultimately returned to Pro Tools for final assembly, reflecting the era’s transitional workflow. For mixdown, Chris Fogel routed signals through Euphonix converters, often handling large sessions of 40 to over 80 tracks. Final mixes were printed to both 1/2-inch analogue tape, specifically Emtec 900 at +5, and Alesis Masterlink systems, providing both analogue weight and digital precision.
The console environment played a central role. Fogel mixed through a Euphonix System 5, using its onboard EQ as the primary tonal shaping tool, rarely relying on external equalisation except for a GML EQ across the stereo bus. Dynamics processing included SSL-style compression on drum and bass submixes, typically applying between 4 and 8 dB of gain reduction with slow attack and fast release, creating the characteristic “Brit squash” effect. Additional compression came from units such as the Empirical Labs Distressor and dbx 160, the latter frequently used on drums and occasionally stacked for more aggressive control.
Effects processing was a defining part of the album’s sound. Lexicon 480L reverbs were used consistently, often providing either a small room or plate ambience depending on the track. Eventide DSP4000 and Yamaha SPX990 units added further spatial and modulation effects. Delays leaned heavily toward Roland SDE-3000 and TC Electronic 2290 units, with Fogel favouring a delay-driven mix aesthetic over reverb-heavy treatments. Haas delays in the range of 7 to 10 milliseconds were applied to guitars and wide instruments to enhance stereo spread.
Monitoring and mix translation were carefully managed. Fogel worked primarily on NHT A-20 monitors, referencing larger ATC systems and finalising vocal balances on small Fostex 6301 speakers. His approach emphasised low-level mixing to ensure balance and translation, moving between systems to confirm consistency across playback environments.
Vocal treatment was a critical challenge throughout the project. Morissette’s vocal sibilance, often peaking around 11 kHz, was addressed using tight notch filtering rather than broad de-essing. Signal chains for vocals included microphones such as the AKG C12-VR and Audio-Technica AT4060, routed through Little Labs and Avalon microphone preamps before hitting Avalon EQ and the Sony 3348. In some cases, vocals were heavily compressed using dbx 160 units to match tonal characteristics of earlier recordings.
Instrument tracking reflected a flexible and often unconventional setup. Drum recording frequently relied on minimal microphone configurations, including Neumann U67 overheads, Shure Beta 56 and Beta 52 on snare and kick, Neumann U47s on toms, and a Sennheiser 421 on kick. Additional room ambience was created by placing multiple microphones in adjacent spaces and heavily compressing them to generate characterful room sounds. Bass was recorded through DI chains incorporating Neve 1073 preamps, Urei LA-2A compressors, and Pultec equalisers, while guitars were often tracked with extensive pedal processing in isolated rooms to maintain separation.
The mixing philosophy across Under Rug Swept prioritised feel and immediacy over technical perfection. Both Fogel and Jacobs emphasised capturing performances quickly, avoiding overproduction, and maintaining the emotional intent of Morissette’s songwriting. This approach is evident in standout tracks like Hands Clean, with its wide, delay-driven guitar textures and tightly controlled vocal presentation, and So Unsexy, which showcases the album’s balance between intimacy and layered production detail.